CMMG's 9mm Barrel and BCG Kit allow you to build a Pistol Caliber Carbine using CMMG's Patent Pending Radial Delayed Blowback System. Unlike typical direct blowback systems, 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. 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.*Older Mk9 lowers will require one of their retrofit kits to convert it to a Radial Delayed Blowback compatible lower, instead of Traditional Blowback.
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| Length: | 5" |
| Length Range: | 4"-6" |
| Twist: | 1:10" |
| Series: | Kit |
| Includes: | Bolt Carrier Group |
| Firearm Fit: | AR-Platform |
| Weight: | 1.40 lbs |
| Color: | Black |
| Material: | 4140 Chromoly Steel |
| Model: | Replacement Barrel |
| Thread Pattern: | 1/2"x28 |
| Finish: | Salt Bath Nitride |
| Caliber: | 9mm Luger |
