The CMMG 8" 9mm Barrel and BCG Kit allow you to build a Pistol Caliber Carbine using their Patent Pending Radial Delayed Blowback System™. Unlike typical direct blowback systems, Radial Delayed Blowback 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.

Their Barrel and Bolt Kits are designed to work exclusively with mil-spec AR-15 upper receivers with a modified ejection port, like their MkG/MkGs upper, and most mil-spec AR15 lowers when used with 9 AR Conversion mags as well as their MkGs Mk17 and Mk9* lowers. Other manufacturers’ receivers may work, but we cannot guarantee function or reliability.

Specifications:

• Caliber: 9mm
• Operating System: Radial Delayed Blowback
• Barrel Length: 8
• Barrel Twist: 1:10
• Barrel Contour: MT
• Barrel Material: 4140cm
• Barrel Twist: 1:10
• Muzzle Thread: 1/2 X 28
• Finish: Nitride
• Weight: 1.7 lbs.

*Older Mk9 lowers will require one of CMMG's retrofit kits to convert it to a Radial Delayed Blowback compatible lower, instead of Traditional Blowback.

All CMMG products come with their Lifetime Quality Guarantee.