Stock Status: CMMG Radial Delayed Blowback 5.7 x 28mm BCG and 8 inch Barrel Combo
This product is discontinued, a great alternative is: CMMG Radial Delayed Blowback 5.7 x 28mm BCG and 8" Barrel Combo
CMMG's patented Delayed Blowback 5.7 x 28mm system substantially reduces recoil compared to standard blowback 5.7 or AR57 builds.
Our AR57 Barrel and BCG Kit allows you to build a Pistol Caliber Carbine using our Patent Pending Radial Delayed Blowback System. Unlike typical direct blowback systems, our RDB uses a bolt that is forced to rotate and unlock, slowing the BCG. This results in a lighter BCG for a lighter rifle, and less felt recoil than a straight blowback system.
- 8″ Medium Taper
- 1:9 Twist
- 416SS
- Salt Bath Nitride Finish inside and out
- 5.7 x 28mm Chamber
- Threaded 1/2-28
- Radial Delayed Blowback Bolt (Patent Pending)
- Weight: 1lb 10oz
Depending on your state and local laws, you could use this barrel with a lower receiver that is a Registered SBR, or Pistol. Possession of this barrel along with a Non-NFA lower receiver may be Prohibited. We are not lawyers and the above information is not legal advise. Make sure you understand the most up to date federal, state and local laws before proceeding with this product.
