The CMMG 9.2 Barrel Sub-Assembly for 22LR gives you a dedicated rimfire upper receiver component built on proven AR platform architecture. Whether you're assembling a dedicated 22LR AR-15 upper or converting an existing system with the 22AR platform, this barrel sub-assembly delivers the precision and reliability that makes .22 Long Rifle an ideal cartridge for training, small-game hunting, and high-volume range sessions. CMMG engineered these barrels specifically for reliable feeding and consistent accuracy with standard rimfire ammunition.

Available in two configurations to match your build needs: a compact 4.5\" barrel with medium taper profile for short-range work and tactical applications, or a 16.1\" barrel with M4 profile for full-length rifle performance. Both feature 4140 chrome-moly steel with salt bath nitride finishing inside and out—a durable coating that resists corrosion and handles the repetitive wear of high-round-count shooting. Each barrel is cut with a 1:16 twist rate optimized for standard 22LR ammunition and a 1/2-28" threaded muzzle for suppressor or muzzle device compatibility.

The 9.2 sub-assembly includes a barrel collar suited for 22AR conversion systems, allowing you to retrofit existing upper receivers without sourcing adapter parts separately. The sporting-grade chamber maintains reliability across standard velocity and high-velocity rimfire loads. If you're building a dedicated rimfire trainer, a suppressed plinker, or just want another reason to run your AR platform at the range without breaking the bank on centerfire ammunition, CMMG's purposeful engineering makes this a solid foundation.

The CMMG 9.2 Barrel Sub-Assembly for 22LR gives you a dedicated rimfire upper receiver component built on proven AR platform architecture. Whether you're assembling a dedicated 22LR AR-15 upper or converting an existing system with the 22AR platform, this barrel sub-assembly delivers the precision and reliability that makes .22 Long Rifle an ideal cartridge for training, small-game hunting, and high-volume range sessions. CMMG engineered these barrels specifically for reliable feeding and consistent accuracy with standard rimfire ammunition.

Available in two configurations to match your build needs: a compact 4.5\" barrel with medium taper profile for short-range work and tactical applications, or a 16.1\" barrel with M4 profile for full-length rifle performance. Both feature 4140 chrome-moly steel with salt bath nitride finishing inside and out—a durable coating that resists corrosion and handles the repetitive wear of high-round-count shooting. Each barrel is cut with a 1:16 twist rate optimized for standard 22LR ammunition and a 1/2-28" threaded muzzle for suppressor or muzzle device compatibility.

The 9.2 sub-assembly includes a barrel collar suited for 22AR conversion systems, allowing you to retrofit existing upper receivers without sourcing adapter parts separately. The sporting-grade chamber maintains reliability across standard velocity and high-velocity rimfire loads. If you're building a dedicated rimfire trainer, a suppressed plinker, or just want another reason to run your AR platform at the range without breaking the bank on centerfire ammunition, CMMG's purposeful engineering makes this a solid foundation.