Product Features & Specifications
CMMG 99D517A Replacement Barrel Kit with Bolt Carrier Group, 9mm Luger 8" Threaded, Black, Radial Delayed Blowback, Fits AR-Platform
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.
| Brand | CMMG |
| Series | Kit |
| Model | Replacement Barrel |
| Caliber | 9mm Luger |
| Firearm Fit | AR-Platform |
| Length Range | 6"-10" |
| Color | Black |
| Material | 4140 Chromoly Steel |
| Finish | Salt Bath Nitride |
| Twist | 1:10" |
| Length | 8" |
| Includes | Bolt Carrier Group |
| Thread Pattern | 1 / 2"x28 |
| Weight | 1.40 lbs |
| SKU | 158965 |
| UPC | 815835019802 |
| MPN | 99D517A |
