{"id":753,"date":"2023-06-11T08:29:54","date_gmt":"2023-06-11T08:29:54","guid":{"rendered":"https:\/\/nationalgunowner.org\/index.php\/2023\/06\/11\/the-civilian-defensive-rifle-part-1-new-gas-length\/"},"modified":"2023-06-11T08:29:55","modified_gmt":"2023-06-11T08:29:55","slug":"the-civilian-defensive-rifle-part-1-new-gas-length","status":"publish","type":"post","link":"https:\/\/nationalgunowner.org\/index.php\/2023\/06\/11\/the-civilian-defensive-rifle-part-1-new-gas-length\/","title":{"rendered":"The Civilian Defensive Rifle, Part 1: New Gas Length"},"content":{"rendered":"<div>\n<p class=\"yoast-reading-time__wrapper\"><span class=\"yoast-reading-time__icon\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" aria-hidden=\"true\" focusable=\"false\" data-icon=\"clock\" width=\"20\" height=\"20\" fill=\"none\" stroke=\"currentColor\" style=\"display:inline-block;vertical-align:-0.1em\" role=\"img\" viewbox=\"0 0 24 24\"><path stroke-linecap=\"round\" stroke-linejoin=\"round\" stroke-width=\"2\" d=\"M12 8v4l3 3m6-3a9 9 0 11-18 0 9 9 0 0118 0z\"\/><\/svg><\/span><span class=\"yoast-reading-time__spacer\" style=\"display:inline-block;width:1em\"\/><span class=\"yoast-reading-time__descriptive-text\">Estimated reading time:  <\/span><span class=\"yoast-reading-time__reading-time\">12<\/span><span class=\"yoast-reading-time__time-unit\"> minutes<\/span><\/p>\n<figure class=\"wp-block-image size-large\"><picture><source sizes=\"(max-width: 1024px) 100vw, 1024px\" type=\"image\/webp\" data-srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-11-1-1024x683.jpg.webp 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-11-1-400x267.jpg.webp 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-11-1-150x100.jpg.webp 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-11-1-768x512.jpg.webp 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-11-1.jpg.webp 1200w\"><noscript><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-11-1-1024x683.jpg\" alt=\"Civilian Defensive Rifle blends into the desert with M-81 Arid Cerakote from Pro 2 Customs.\" class=\"wp-image-177979\" srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-11-1-1024x683.jpg 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-11-1-400x267.jpg 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-11-1-150x100.jpg 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-11-1-768x512.jpg 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-11-1.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" data-eio=\"l\"\/><\/noscript><\/source><\/picture><figcaption class=\"wp-element-caption\">The CDR with Nightforce ATACR 1-8 in a Scalarworks Leap\/09 mount. M-81 Arid Cerakote by <a href=\"https:\/\/pro2customs.com\/cerakote-color-guide\/?utm_source=GunsAmerica\" class=\"clickTracking\" campaign=\"the-civilian-defensive-rifle-part-1-new-gas-length\" title=\"The Civilian Defensive Rifle, Part 1: New Gas Length\" target=\"_blank\" rel=\"noreferrer noopener\">Pro 2 Customs<\/a><\/figcaption><\/figure>\n<h2 class=\"wp-block-heading\" id=\"h-carbine-plus-one-a-new-gas-system-length\">Carbine Plus One \u2013 A New Gas System Length<\/h2>\n<p>Building a custom Civilian Defensive Rifle.<\/p>\n<p>Last year I was talking with master barrel maker Paul Craddock of Craddock Precision about <a href=\"https:\/\/www.gunsamerica.com\/digest\/projekt-457-part-i\/\" class=\"clickTracking\" campaign=\"the-civilian-defensive-rifle-part-1-new-gas-length\" title=\"The Civilian Defensive Rifle, Part 1: New Gas Length\" target=\"_blank\" rel=\"noreferrer noopener\"><a href=\"https:\/\/www.gunsamerica.com\/digest\/projekt-457-part-i\/?utm_source=GunsAmerica\" class=\"clickTracking\" campaign=\"the-civilian-defensive-rifle-part-1-new-gas-length\" title=\"The Civilian Defensive Rifle, Part 1: New Gas Length\" target=\"_blank\" rel=\"noreferrer noopener\">Projekt 457<\/a>. He mentioned a new barrel and gas system he had created specifically for SBR length-suppressed AR-15s.  It sounded perfect for the Civilian Defensive Rifle and I was intrigued.<\/p>\n<p>The barrel in question is an 11.5 223 Wylde barrel made from a Bartlein blank with a 1 in 7.7 twist.\u00a0 On specs alone, that\u2019s a great barrel but not new or groundbreaking.\u00a0 The hook was the new gas system length.\u00a0 Carbine Plus One, or CPO is a length Paul created to address short-suppressed rifles.\u00a0 The new barrel is part of Craddock\u2019s <a href=\"https:\/\/craddockprecision.com\/signature-11-5-223-wylde\/?utm_source=GunsAmerica\" class=\"clickTracking\" campaign=\"the-civilian-defensive-rifle-part-1-new-gas-length\" title=\"The Civilian Defensive Rifle, Part 1: New Gas Length\" target=\"_blank\" rel=\"noreferrer noopener\">Signature Series<\/a> of barrels.\u00a0<\/p>\n<figure class=\"wp-block-image size-large\"><picture><source sizes=\"(max-width: 1024px) 100vw, 1024px\" type=\"image\/webp\" data-srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0027-1024x683.jpg.webp 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0027-400x267.jpg.webp 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0027-150x100.jpg.webp 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0027-768x512.jpg.webp 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0027.jpg.webp 1200w\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" alt=\"General view of the Carbine Pls One barrel, gas tube and gas block.\" class=\"wp-image-177987 lazyload\" data-eio=\"p\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0027-1024x683.jpg\" srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0027-1024x683.jpg 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0027-400x267.jpg 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0027-150x100.jpg 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0027-768x512.jpg 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0027.jpg 1200w\" data-sizes=\"auto\"\/><noscript><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0027-1024x683.jpg\" alt=\"General view of the Carbine Pls One barrel, gas tube and gas block.\" class=\"wp-image-177987\" srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0027-1024x683.jpg 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0027-400x267.jpg 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0027-150x100.jpg 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0027-768x512.jpg 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0027.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" data-eio=\"l\"\/><\/noscript><\/source><\/picture><figcaption class=\"wp-element-caption\">11.5 inch CPO barrel from Craddock Precision.<\/figcaption><\/figure>\n<h2 class=\"wp-block-heading\">The Goal With My Civilian Defense Rifle<\/h2>\n<p>I had wanted to build a new \u201cfighting\u201d rifle and the CPO barrel was the perfect way to start the project.\u00a0 A note to readers: this rifle is what I wanted in a defensive or \u201cfighting\u201d rifle.\u00a0 It is for civilian use.\u00a0 A rifle for Law Enforcement or Military use would probably be different.\u00a0 So keep that in mind while reading.<\/p>\n<p>This rifle would run a Surefire SOCOM556 RC2 suppressor all the time.\u00a0 If you are checking your house after hearing a bump in the night, or shooting at zombies from a car you may not have time to put on ear protection.\u00a0 An unsuppressed short rifle makes a ton of noise which can easily disorient the shooter.\u00a0 A suppressor or a can goes a long way towards reducing that to let you fight more effectively.\u00a0 One downside of cans is that they can produce more gas going to the bolt carrier in a traditional AR-15-style rifle.\u00a0 It is possible for a can on a short barrel to impact reliability and cycling.\u00a0 Enter the CPO.<\/p>\n<figure class=\"wp-block-image size-large\"><picture><source sizes=\"(max-width: 1024px) 100vw, 1024px\" type=\"image\/webp\" data-srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-194756166-1024x576.jpg.webp 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-194756166-400x225.jpg.webp 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-194756166-150x84.jpg.webp 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-194756166-768x432.jpg.webp 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-194756166.jpg.webp 1200w\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" alt=\"Civilian Defensive Rifle set up for long range shooting the Precision Rifle Series.\" class=\"wp-image-177988 lazyload\" data-eio=\"p\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-194756166-1024x576.jpg\" srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-194756166-1024x576.jpg 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-194756166-400x225.jpg 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-194756166-150x84.jpg 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-194756166-768x432.jpg 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-194756166.jpg 1200w\" data-sizes=\"auto\"\/><noscript><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-194756166-1024x576.jpg\" alt=\"Civilian Defensive Rifle set up for long range shooting the Precision Rifle Series.\" class=\"wp-image-177988\" srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-194756166-1024x576.jpg 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-194756166-400x225.jpg 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-194756166-150x84.jpg 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-194756166-768x432.jpg 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-194756166.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" data-eio=\"l\"\/><\/noscript><\/source><\/picture><figcaption class=\"wp-element-caption\">Testing the CDR prior to a PRS long range match.  Nightforce NX8 2.5-20 optic.<\/figcaption><\/figure>\n<h2 class=\"wp-block-heading\">CPO Backstory<\/h2>\n<p>I asked Paul how the CPO came to be. \u201cGoing back 15+ years, it was always strange to me that there were only 3 or 4 basic gas system lengths for ARs.\u00a0 I started to see that there were advantages to having new gas system lengths for certain applications with specific caliber and barrel lengths.\u00a0 With all the variables of parts, buffer weights, carrier weights, suppressed or unsuppressed, you can improve the fine-tuning much better when the gas system is more ideal from the start.\u201d<\/p>\n<p>\u201cI went down the long road of figuring what length was most appropriate for each caliber and barrel length.\u00a0 We have anything from\u00a0Carbine Minus One, Pistol Minus one, Rifle Plus Two, and many more.\u00a0 We now offer 14 different gas system lengths to fit any application.\u201d<\/p>\n<h2 class=\"wp-block-heading\">CPO Advantages<\/h2>\n<p>\u201cThe CPO length offers several advantages on an 11.5-inch barrel.\u00a0 It produces softer recoil, increased reliability and it\u2019s easier on your brass.\u00a0 All those advantages are more significant if you suppress the rifle.\u00a0 The gas port being farther from the chamber allows you to drive that projectile longer before robbing pressure to cycle the gun.\u00a0 On average we are seeing 3-5% more velocity with the CPO compared to the same configuration with carbine length.\u00a0 The CPO has seen extensive use with some Tier One individuals and the LEO community as well.\u201d<\/p>\n<figure class=\"wp-block-image size-large\"><picture><source sizes=\"(max-width: 1024px) 100vw, 1024px\" type=\"image\/webp\" data-srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-2-1024x683.jpg.webp 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-2-400x267.jpg.webp 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-2-150x100.jpg.webp 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-2-768x512.jpg.webp 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-2.jpg.webp 1200w\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" alt=\"Civilian Defensive Rifle set up for short range shooting with a red dot.\" class=\"wp-image-177989 lazyload\" data-eio=\"p\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-2-1024x683.jpg\" srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-2-1024x683.jpg 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-2-400x267.jpg 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-2-150x100.jpg 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-2-768x512.jpg 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-2.jpg 1200w\" data-sizes=\"auto\"\/><noscript><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-2-1024x683.jpg\" alt=\"Civilian Defensive Rifle set up for short range shooting with a red dot.\" class=\"wp-image-177989\" srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-2-1024x683.jpg 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-2-400x267.jpg 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-2-150x100.jpg 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-2-768x512.jpg 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-2.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" data-eio=\"l\"\/><\/noscript><\/source><\/picture><figcaption class=\"wp-element-caption\">The CDR with Aimpoint H2 6 MOA red dot in a Scalarworks Leap\/01 mount.<\/figcaption><\/figure>\n<p>\u201cA short stiff barrel is more rigid by nature.\u00a0 That rigidity is going to trump velocity by a large degree.\u00a0 If choosing between a 12 inch and a 14.5 or 16 inch, I would rather have the rigidity, especially when it\u2019s suppressed.\u00a0 Rigidity gives better harmonics, especially with a can.\u00a0 Adding a suppressor is hanging a big weight on the end of your barrel and it tries to impede the natural harmonics of the barrel.\u00a0 A stiffer barrel resists that weight more and is, therefore, more consistent.\u201d<\/p>\n<h2 class=\"wp-block-heading\">Can Weight and Barrel Whipping<\/h2>\n<p>To grossly oversimplify the concept, a barrel whips after firing.\u00a0 A can\/weight on the end of the barrel will change how the wave travels through the barrel.\u00a0 A stiffer barrel is less likely to be affected by the change in the wave.<\/p>\n<div class=\"ga-listings-wrap\">\n<h2>Available on GunsAmerica Now<\/h2>\n<\/div>\n<p><!-- MC HIT  | http:\/\/10.0.0.186:8080\/?format=json&keyword=AR+Series&cid=1646&numberperpage=10&pagenum=1 --><\/p>\n<figure class=\"wp-block-image size-large\"><picture><source sizes=\"(max-width: 1024px) 100vw, 1024px\" type=\"image\/webp\" data-srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-002807241-1024x683.jpg.webp 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-002807241-400x267.jpg.webp 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-002807241-150x100.jpg.webp 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-002807241-768x512.jpg.webp 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-002807241.jpg.webp 1200w\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" alt=\"Check suppressor alignment to avoid baffle strikes.\" class=\"wp-image-177990 lazyload\" data-eio=\"p\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-002807241-1024x683.jpg\" srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-002807241-1024x683.jpg 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-002807241-400x267.jpg 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-002807241-150x100.jpg 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-002807241-768x512.jpg 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-002807241.jpg 1200w\" data-sizes=\"auto\"\/><noscript><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-002807241-1024x683.jpg\" alt=\"Check suppressor alignment to avoid baffle strikes.\" class=\"wp-image-177990\" srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-002807241-1024x683.jpg 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-002807241-400x267.jpg 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-002807241-150x100.jpg 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-002807241-768x512.jpg 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-002807241.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" data-eio=\"l\"\/><\/noscript><\/source><\/picture><figcaption class=\"wp-element-caption\">When mounting a new suppressor it is a good idea to check it with an alignment rod to avoid baffle strikes. <\/figcaption><\/figure>\n<p>For a suppressed 11.5 inch SBR in 5.56mm the CPO was the hot ticket.\u00a0 If you have an unconventional build or idea and want to cut out some of the guesswork, give <a href=\"https:\/\/craddockprecision.com\/contact-us\/?utm_source=GunsAmerica\" class=\"clickTracking\" campaign=\"the-civilian-defensive-rifle-part-1-new-gas-length\" title=\"The Civilian Defensive Rifle, Part 1: New Gas Length\" target=\"_blank\" rel=\"noreferrer noopener\">Craddock Precision<\/a> a call.\u00a0 They can help you choose the right barrel and gas length whether you are building an 8 inch 7.62\u00d739 or a 26 inch 6mm ARC.\u00a0 All the Signature Series barrels include the gas tube so you don\u2019t have to try and find an oddball length.<\/p>\n<h2 class=\"wp-block-heading\" id=\"h-tuning-the-civilian-defensive-rifle-gas-system\">Tuning The Civilian Defensive Rifle Gas System <\/h2>\n<p>In competition shooting with an AR, I always run an adjustable gas block to tune the rifle to my ammo.\u00a0 As this was a fighting rifle I would be using a standard gas block.\u00a0 I would also be using a few non standard parts like the JP Silent Capture Spring system, A5 buffer tube, Law Tactical folding stock adapter and the Surefire can.\u00a0 To maximize my tuning ability, Craddock purposely under drilled the gas port by a few thousandths so I could tune with port size if needed.\u00a0 Had I used standard parts the port size would have been on the money as delivered.<\/p>\n<p>Once the receiver was Form 1ed as an SBR the build started.\u00a0 I did a lot of testing to ensure reliability as that is the number one most important thing for a gun you may use to save your own life.\u00a0 I was using a standard weight BCG from <a href=\"https:\/\/jprifles.com\/1.4.7_FMOS.php\" class=\"clickTracking\" campaign=\"the-civilian-defensive-rifle-part-1-new-gas-length\" title=\"The Civilian Defensive Rifle, Part 1: New Gas Length\"\/><a href=\"https:\/\/jprifles.com\/1.4.7_FMOS.php?utm_source=GunsAmerica\" class=\"clickTracking\" campaign=\"the-civilian-defensive-rifle-part-1-new-gas-length\" title=\"The Civilian Defensive Rifle, Part 1: New Gas Length\" target=\"_blank\" rel=\"noreferrer noopener\">JP Enterprises<\/a> to keep things from getting too complicated.\u00a0 That left buffer\/spring weight and gas port as my tuning options.<\/p>\n<figure class=\"wp-block-image size-large\"><picture><source sizes=\"(max-width: 1024px) 100vw, 1024px\" type=\"image\/webp\" data-srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9957-1024x683.jpg.webp 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9957-400x267.jpg.webp 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9957-150x100.jpg.webp 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9957-768x512.jpg.webp 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9957.jpg.webp 1200w\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" alt=\"Tune your gas system with the JP Enterprises silent Captured Spring.\" class=\"wp-image-177991 lazyload\" data-eio=\"p\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9957-1024x683.jpg\" srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9957-1024x683.jpg 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9957-400x267.jpg 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9957-150x100.jpg 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9957-768x512.jpg 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9957.jpg 1200w\" data-sizes=\"auto\"\/><noscript><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9957-1024x683.jpg\" alt=\"Tune your gas system with the JP Enterprises silent Captured Spring.\" class=\"wp-image-177991\" srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9957-1024x683.jpg 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9957-400x267.jpg 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9957-150x100.jpg 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9957-768x512.jpg 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9957.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" data-eio=\"l\"\/><\/noscript><\/source><\/picture><figcaption class=\"wp-element-caption\">The JP SCS buffer and full mass BCG.<\/figcaption><\/figure>\n<h2 class=\"wp-block-heading\">Testing The Civilian Defense Rifle<\/h2>\n<p>Initially, the gun ran 100% while suppressed with both 55gr and 77gr ammo.\u00a0 With the can removed it still ran with the 77s but not the 55s.\u00a0 <a href=\"https:\/\/jprifles.com\/1.4.7.2_os.php?utm_source=GunsAmerica\" class=\"clickTracking\" campaign=\"the-civilian-defensive-rifle-part-1-new-gas-length\" title=\"The Civilian Defensive Rifle, Part 1: New Gas Length\" target=\"_blank\" rel=\"noreferrer noopener\">The JP SCS<\/a> is an assembled complete unit that replaces the individual buffer and springs.\u00a0 It can be tuned two ways.\u00a0 You can add or remove tungsten or steel weights from the unit to change the weight, and you can change the spring weight.\u00a0 While tuning the SCS I removed the weights and ran the lightest spring but still had occasional issues running 55 gr ammo without the can.\u00a0 It was time to tune the port.<\/p>\n<figure class=\"wp-block-image size-large\"><picture><source sizes=\"(max-width: 1024px) 100vw, 1024px\" type=\"image\/webp\" data-srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-182129832-1024x683.jpg.webp 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-182129832-400x267.jpg.webp 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-182129832-150x100.jpg.webp 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-182129832-768x512.jpg.webp 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-182129832.jpg.webp 1200w\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" alt=\"Drilling the gas port on the Civilian Defensive Rifle.\" class=\"wp-image-177992 lazyload\" data-eio=\"p\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-182129832-1024x683.jpg\" srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-182129832-1024x683.jpg 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-182129832-400x267.jpg 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-182129832-150x100.jpg 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-182129832-768x512.jpg 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-182129832.jpg 1200w\" data-sizes=\"auto\"\/><noscript><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-182129832-1024x683.jpg\" alt=\"Drilling the gas port on the Civilian Defensive Rifle.\" class=\"wp-image-177992\" srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-182129832-1024x683.jpg 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-182129832-400x267.jpg 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-182129832-150x100.jpg 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-182129832-768x512.jpg 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-182129832.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" data-eio=\"l\"\/><\/noscript><\/source><\/picture><figcaption class=\"wp-element-caption\">Reaming the gas port on the CPO barrel from Craddock Precision.<\/figcaption><\/figure>\n<p>Craddock offered to open the port for me. \u00a0I just had to ship the barrel back, but I didn\u2019t want to wait.\u00a0 While it could be done with a hand drill and bits that is not the preferred way.\u00a0 You can get high-quality precision reamers for about $15 from shops like McMaster-Carr.\u00a0 I bought a couple of reamers to open the gas port.<\/p>\n<p>I had never opened a gas port previously and I was nervous about accidentally destroying an expensive premium barrel in the process.\u00a0 It\u2019s a simple process, especially with a drill press, and Paul Craddock walked me through the steps.\u00a0 That said, my b-hole was definitely puckered once the barrel was secured in a vise and the drill press turned on.\u00a0 The fear meant I took things very slowly and triple checked everything and it paid off.\u00a0 Port enlarged with no issues.<\/p>\n<h2 class=\"wp-block-heading\">And\u2026 More Tests<\/h2>\n<p>More testing; it was better but still not quite there.\u00a0 Another trip to the drill press with the reamer and all was well.\u00a0 Now the rifle ran 100% with all my ammo with and without the can.<\/p>\n<p>During testing the rifle was significantly more accurate (tighter groups) without the can than with it.\u00a0 Sub MOA vs about 1.5-2.0 MOA.\u00a0 As this is a defensive rifle it only needs to be able to hit a man sized target at 300-400 yards; the accuracy is overkill for that.<\/p>\n<figure class=\"wp-block-image size-large\"><picture><source sizes=\"(max-width: 1024px) 100vw, 1024px\" type=\"image\/webp\" data-srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-234940606-1024x683.jpg.webp 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-234940606-400x267.jpg.webp 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-234940606-150x100.jpg.webp 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-234940606-768x512.jpg.webp 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-234940606.jpg.webp 1200w\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" alt=\"A windy day led to horizontal dispersion of the group for the Civilian Defensive Rifle.\" class=\"wp-image-177993 lazyload\" data-eio=\"p\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-234940606-1024x683.jpg\" srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-234940606-1024x683.jpg 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-234940606-400x267.jpg 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-234940606-150x100.jpg 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-234940606-768x512.jpg 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-234940606.jpg 1200w\" data-sizes=\"auto\"\/><noscript><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-234940606-1024x683.jpg\" alt=\"A windy day led to horizontal dispersion of the group for the Civilian Defensive Rifle.\" class=\"wp-image-177993\" srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-234940606-1024x683.jpg 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-234940606-400x267.jpg 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-234940606-150x100.jpg 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-234940606-768x512.jpg 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-234940606.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" data-eio=\"l\"\/><\/noscript><\/source><\/picture><figcaption class=\"wp-element-caption\">5 round grup at 200 yards.  Grid squares are 1 inch.<\/figcaption><\/figure>\n<p>Compared to my competition rifles this is not great accuracy.\u00a0 Despite that, while testing the rifle during a <a href=\"https:\/\/robleatham.com\/training\/rifle-and-pistol-courses\/\" class=\"clickTracking\" campaign=\"the-civilian-defensive-rifle-part-1-new-gas-length\" title=\"The Civilian Defensive Rifle, Part 1: New Gas Length\"\/><a href=\"https:\/\/robleatham.com\/training\/rifle-and-pistol-courses\/?utm_source=GunsAmerica\" class=\"clickTracking\" campaign=\"the-civilian-defensive-rifle-part-1-new-gas-length\" title=\"The Civilian Defensive Rifle, Part 1: New Gas Length\" target=\"_blank\" rel=\"noreferrer noopener\">Rob Leatham and Travis McCamish<\/a> class last year I was able to score first-round hits with it out to 790 yards on a full IPSC.\u00a0 I consider that exceptional for a defensive rifle to the point of being overkill.<\/p>\n<h2 class=\"wp-block-heading\" id=\"h-civilian-defensive-rifle-upper-and-lower-receivers\">Civilian Defensive Rifle Upper and Lower Receivers<\/h2>\n<p>A lot of the parts used to build the Civilian Defensive Rifle (CDR) were based on my experience with putting together the <a href=\"https:\/\/www.gunsamerica.com\/digest\/the-ultimate-3-gun-rifle-part-4\/\" class=\"clickTracking\" campaign=\"the-civilian-defensive-rifle-part-1-new-gas-length\" title=\"The Civilian Defensive Rifle, Part 1: New Gas Length\"\/><a href=\"https:\/\/www.gunsamerica.com\/digest\/the-ultimate-3-gun-rifle-part-4\/?utm_source=GunsAmerica\" class=\"clickTracking\" campaign=\"the-civilian-defensive-rifle-part-1-new-gas-length\" title=\"The Civilian Defensive Rifle, Part 1: New Gas Length\" target=\"_blank\" rel=\"noreferrer noopener\">Ultimate 3 Gun Rifle<\/a> from 2021.\u00a0 You can see the complete build at the link.<\/p>\n<p>If something is working well, is accurate and reliable why mess with it?\u00a0 I used the same <a href=\"http:\/\/www.kearms.com\/lower-flared-mag-well\" class=\"clickTracking\" campaign=\"the-civilian-defensive-rifle-part-1-new-gas-length\" title=\"The Civilian Defensive Rifle, Part 1: New Gas Length\" target=\"_blank\" rel=\"noreferrer noopener\"><a href=\"http:\/\/www.kearms.com\/lower-flared-mag-well?utm_source=GunsAmerica\" class=\"clickTracking\" campaign=\"the-civilian-defensive-rifle-part-1-new-gas-length\" title=\"The Civilian Defensive Rifle, Part 1: New Gas Length\" target=\"_blank\" rel=\"noreferrer noopener\">KE Arms Flared Magwell Lower<\/a>.\u00a0 The main reason I love this lower is the giant magwell.\u00a0 It\u2019s very large so reloads are fast and easy. Unlike some other magwell lowers on the market this one is compatible with both Surefire quad stack mags and the fantastic Magpul D60 drums.\u00a0It is also machined from a billet of 7075 aluminum with an integrated trigger guard.<\/p>\n<figure class=\"wp-block-image size-large\"><picture><source sizes=\"(max-width: 1024px) 100vw, 1024px\" type=\"image\/webp\" data-srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-6-1024x683.jpg.webp 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-6-400x267.jpg.webp 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-6-150x100.jpg.webp 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-6-768x512.jpg.webp 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-6.jpg.webp 1200w\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" alt=\"Big magwells make reloads fast with the Civilian Defensive Rifle.\" class=\"wp-image-177994 lazyload\" data-eio=\"p\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-6-1024x683.jpg\" srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-6-1024x683.jpg 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-6-400x267.jpg 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-6-150x100.jpg 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-6-768x512.jpg 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-6.jpg 1200w\" data-sizes=\"auto\"\/><noscript><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-6-1024x683.jpg\" alt=\"Big magwells make reloads fast with the Civilian Defensive Rifle.\" class=\"wp-image-177994\" srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-6-1024x683.jpg 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-6-400x267.jpg 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-6-150x100.jpg 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-6-768x512.jpg 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-6.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" data-eio=\"l\"\/><\/noscript><\/source><\/picture><figcaption class=\"wp-element-caption\">With the KE Arms magwell lower reloading is like throwing a hotdog down a hallway.<\/figcaption><\/figure>\n<p>I absolutely love the <a href=\"https:\/\/www.gibbzarms.com\/gibbz-advantage\/?utm_source=GunsAmerica\" class=\"clickTracking\" campaign=\"the-civilian-defensive-rifle-part-1-new-gas-length\" title=\"The Civilian Defensive Rifle, Part 1: New Gas Length\" target=\"_blank\" rel=\"noreferrer noopener\">Gibbz Arms<\/a> side charge upper on my competition rifle.\u00a0 If you start unloaded, have to clear a jam, or run the bolt for any reason the nonreciprocating side charging handle is superior to all the traditional rear charging handles for the AR-15, even the extra large models with what looks like wings on the side.\u00a0 The Gibbz uppers are compatible with any standard BCG; you just have to change the cam pin on your BCG and the uppers all come with the cam pin.\u00a0 My comp rifle has over 7000 rounds through it and there are no issues with the cam pin.<\/p>\n<p>You can easily grab the side charging handle even with big optics on your rifle.\u00a0 And for those using a can, as I am here, the rear of the upper is sealed with a trapdoor to keep all that extra gas out of your face.\u00a0 The regular Gibbz G4 upper has no dust cover and a huge ejection port to handle everything up to 458 SOCOM.\u00a0 For a fighting rifle, I wanted a dust cover to keep crap out of the action.\u00a0 Gibbz makes the <a href=\"https:\/\/www.gibbzarms.com\/product\/mg4-side-charging-upper-receiver\/?utm_source=GunsAmerica\" class=\"clickTracking\" campaign=\"the-civilian-defensive-rifle-part-1-new-gas-length\" title=\"The Civilian Defensive Rifle, Part 1: New Gas Length\" target=\"_blank\" rel=\"noreferrer noopener\">MG4 Upper<\/a> which comes with a dust cover and a brass deflector unlike the competition upper.<\/p>\n<figure class=\"wp-block-image size-large\"><picture><source sizes=\"(max-width: 1024px) 100vw, 1024px\" type=\"image\/webp\" data-srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0005-1024x683.jpg.webp 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0005-400x267.jpg.webp 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0005-150x100.jpg.webp 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0005-768x512.jpg.webp 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0005.jpg.webp 1200w\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" alt=\"The Civilian Defensive Rifle is side charging and is superior to traditional AR-15 charging handles.\" class=\"wp-image-177995 lazyload\" data-eio=\"p\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0005-1024x683.jpg\" srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0005-1024x683.jpg 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0005-400x267.jpg 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0005-150x100.jpg 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0005-768x512.jpg 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0005.jpg 1200w\" data-sizes=\"auto\"\/><noscript><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0005-1024x683.jpg\" alt=\"The Civilian Defensive Rifle is side charging and is superior to traditional AR-15 charging handles.\" class=\"wp-image-177995\" srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0005-1024x683.jpg 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0005-400x267.jpg 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0005-150x100.jpg 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0005-768x512.jpg 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0005.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" data-eio=\"l\"\/><\/noscript><\/source><\/picture><figcaption class=\"wp-element-caption\">The non-reciprocating side charging handle is what sets Gibbs Arms uppers apart.<\/figcaption><\/figure>\n<p>The MG4 also comes with a forward assist.\u00a0 I firmly believe that forward assists are stupid.\u00a0 If a round won\u2019t go in the chamber the last thing I want to do is try to force it in the chamber by smashing the forward assist.\u00a0 EGW makes a great plug to cover the hole and delete the forward assist for 10 bucks.<\/p>\n<h2 class=\"wp-block-heading\" id=\"h-civilian-defensive-rifle-trigger-and-safety\">Civilian Defensive Rifle Trigger and Safety<\/h2>\n<p>The lower was rounded out with my favorite 45-degree throw safety from KE Arms and their excellent <a href=\"http:\/\/www.kearms.com\/rts-1-sear-link-technology-trigger-with-ambi-selector.aspx\" class=\"clickTracking\" campaign=\"the-civilian-defensive-rifle-part-1-new-gas-length\" title=\"The Civilian Defensive Rifle, Part 1: New Gas Length\"\/><a href=\"https:\/\/kearms.americommerce.com\/rts-1-sear-link-technology-trigger-with-ambi-selector.aspx?utm_source=GunsAmerica\" class=\"clickTracking\" campaign=\"the-civilian-defensive-rifle-part-1-new-gas-length\" title=\"The Civilian Defensive Rifle, Part 1: New Gas Length\" target=\"_blank\" rel=\"noreferrer noopener\">RTS-1 Rekluse trigger<\/a>.\u00a0 It is a sealed cassette-style trigger with a single stage 4.5 pound pull.\u00a0 1 pound triggers are great for competition but for a rifle that may be carried, it\u2019s too light.\u00a0 The Rekluse has a very clean break at 4.5 pounds which is much more appropriate for carry. \u00a0The reset is positive and distinct. \u00a0It also features a full power hammer spring so you will always get primer ignition and the cassette is sealed to keep dirt and crap out of the moving parts.<\/p>\n<figure class=\"wp-block-image size-large\"><picture><source sizes=\"(max-width: 1024px) 100vw, 1024px\" type=\"image\/webp\" data-srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9983-1024x683.jpg.webp 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9983-400x267.jpg.webp 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9983-150x100.jpg.webp 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9983-768x512.jpg.webp 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9983.jpg.webp 1200w\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" alt=\"RTS1 Rekluse sealed cassette trigger, perfect for the Civilian Defensive Rifle.\" class=\"wp-image-177996 lazyload\" data-eio=\"p\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9983-1024x683.jpg\" srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9983-1024x683.jpg 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9983-400x267.jpg 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9983-150x100.jpg 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9983-768x512.jpg 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9983.jpg 1200w\" data-sizes=\"auto\"\/><noscript><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9983-1024x683.jpg\" alt=\"RTS1 Rekluse sealed cassette trigger, perfect for the Civilian Defensive Rifle.\" class=\"wp-image-177996\" srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9983-1024x683.jpg 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9983-400x267.jpg 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9983-150x100.jpg 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9983-768x512.jpg 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-9983.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" data-eio=\"l\"\/><\/noscript><\/source><\/picture><figcaption class=\"wp-element-caption\">The Rekluse trigger is sealed to keep crap out of the trigger.<\/figcaption><\/figure>\n<p>The Rekluse has another unique feature.\u00a0 There is no disconector.\u00a0 When fired the bolt only has to push the hammer out of the way.\u00a0 This eliminates the force of the bolt hitting the hammer and transmitting to other components of the trigger.\u00a0 The design also allows you to engage the safety even with the hammer down.\u00a0 It drops in and is rated to work with any caliber including 22LR conversions and blowback 9mm PCCs.<\/p>\n<p>Stay Tuned for Part 2<\/p>\n<figure class=\"wp-block-image size-large\"><picture><source sizes=\"(max-width: 1024px) 100vw, 1024px\" type=\"image\/webp\" data-srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0009-1024x683.jpg.webp 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0009-400x267.jpg.webp 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0009-150x100.jpg.webp 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0009-768x512.jpg.webp 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0009.jpg.webp 1200w\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" alt=\"The barrel of the safety can be flipped to switch between 45 and 90 degree throw.\" class=\"wp-image-177997 lazyload\" data-eio=\"p\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0009-1024x683.jpg\" srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0009-1024x683.jpg 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0009-400x267.jpg 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0009-150x100.jpg 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0009-768x512.jpg 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0009.jpg 1200w\" data-sizes=\"auto\"\/><noscript><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0009-1024x683.jpg\" alt=\"The barrel of the safety can be flipped to switch between 45 and 90 degree throw.\" class=\"wp-image-177997\" srcset=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0009-1024x683.jpg 1024w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0009-400x267.jpg 400w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0009-150x100.jpg 150w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0009-768x512.jpg 768w, https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2023\/04\/Durka-0009.jpg 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" data-eio=\"l\"\/><\/noscript><\/source><\/picture><figcaption class=\"wp-element-caption\">The KE Arms short throw safety only moves 45 degrees and why it is my favorite.<\/figcaption><\/figure>\n<p class=\"has-text-align-center\" style=\"font-size:24px\"><strong><em>*** <a class=\"clickTracking\" campaign=\"BuySellGA_Register\" rel=\"noreferrer noopener\" href=\"https:\/\/www.gunsamerica.com\/administration\/user\/Register.aspx\" title=\"The Civilian Defensive Rifle, Part 1: New Gas Length\" target=\"_blank\">Buy and Sell on GunsAmerica! All Local Sales are FREE!<\/a> ***<\/em><\/strong><\/p>\n<\/p><\/div>\n<p>\n\t\t\t\t\t\t<img loading=\"lazy\" alt=\"\" class=\"avatar avatar-96 photo avatar-default lazyload\" height=\"96\" width=\"96\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2019\/09\/Matt-K-Bio-1-96x96.jpg\" decoding=\"async\"\/><noscript><img loading=\"lazy\" decoding=\"async\" alt=\"\" class=\"avatar avatar-96 photo avatar-default\" height=\"96\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2019\/09\/Matt-K-Bio-1-96x96.jpg\" width=\"96\" data-eio=\"l\"\/><\/noscript><br \/>\n\t\t\t\t\t\t<span class=\"author_description_intro\">About the author:<\/span><br \/>\n\t\t\t\t\t\t<span class=\"author_name\">Matt Kartozian<\/span> is a current Hi-Point Grand Master and former professional competition shooter, and gunsmith.  Matt now works as a photographer and writer and can often be found on the sidelines of professional sporting events and on racecourses around the world.  You can follow Matt\u2019s adventures on Instagram at &#13;<br \/>\nhttps:\/\/www.instagram.com\/customglock\/ &#13;<br \/>\nand&#13;<br \/>\nhttps:\/\/www.instagram.com\/durkadurkaphoto\/\n\t\t\t\t\t<\/p>\n<p><script async defer src=\"https:\/\/platform.instagram.com\/en_US\/embeds.js\"><\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Estimated reading time: 12 minutes The CDR with Nightforce ATACR 1-8 in a Scalarworks Leap\/09 mount. M-81 Arid Cerakote by Pro 2 Customs Carbine Plus One \u2013 A New Gas System Length Building a custom Civilian Defensive Rifle. Last year I was talking with master barrel maker Paul Craddock of Craddock Precision about Projekt 457. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":754,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-753","post","type-post","status-publish","format-standard","has-post-thumbnail","category-uncategorized"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/nationalgunowner.org\/index.php\/wp-json\/wp\/v2\/posts\/753","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nationalgunowner.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nationalgunowner.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nationalgunowner.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nationalgunowner.org\/index.php\/wp-json\/wp\/v2\/comments?post=753"}],"version-history":[{"count":1,"href":"https:\/\/nationalgunowner.org\/index.php\/wp-json\/wp\/v2\/posts\/753\/revisions"}],"predecessor-version":[{"id":755,"href":"https:\/\/nationalgunowner.org\/index.php\/wp-json\/wp\/v2\/posts\/753\/revisions\/755"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nationalgunowner.org\/index.php\/wp-json\/wp\/v2\/media\/754"}],"wp:attachment":[{"href":"https:\/\/nationalgunowner.org\/index.php\/wp-json\/wp\/v2\/media?parent=753"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nationalgunowner.org\/index.php\/wp-json\/wp\/v2\/categories?post=753"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nationalgunowner.org\/index.php\/wp-json\/wp\/v2\/tags?post=753"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}