Brand: CMMG
Model: Replacement Barrel Kit
Caliber: 9mm Luger
Barrel Length: 8"
Firearm Fit: AR-Platform
Sights: None
Barrel Finish: Black Nitride
Barrel Material: Chrome Moly Steel
Twist: 1:10"
Includes: Bolt Carrier Group
Thread Pattern: 1 / 2"x28
Weight: 1.40 lbs

Features

Upgrade your next Pistol Caliber Carbine (PCC) build with the cutting-edge CMMG 9mm Barrel and BCG Kit, featuring the industry-leading Radial Delayed Blowback (RDB) system. Unlike standard direct blowback setups that rely on heavy buffers, CMMG’s patent-pending RDB technology utilizes a rotating bolt that must unlock before cycling. This innovative design significantly reduces felt recoil and allows for a lighter bolt carrier group (BCG), resulting in a faster-handling, more comfortable rifle.

Designed for maximum versatility and reliability, these 9mm bolt and barrel kits are engineered to work seamlessly with mil-spec AR-15 upper receivers (featuring modified ejection ports) and are optimized for CMMG MkGs, Mk17, and Mk9 lowers. Whether you are using 9mm AR conversion magazines or dedicated lowers, this kit provides the ultimate foundation for a high-performance 9mm AR-15. Experience the smoother cycling and enhanced precision of a true Radial Delayed Blowback system—the gold standard for modern PCC enthusiasts.

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