CMMG Dedicated Barrel and Bolt Group Kit, 4.5″ MT 4140CM

Hard to find elsewhere but we have it in stock!

The CMMG Bolt and Barrel kit is the heart and soul of any .22LR AR-15 dedicated blaster build. No buffer tube required!

See our Blaster Build Guide for build directions and reliability tips.

Bolt Group

• Patented .22LR self-contained blowback bolt group for dedicated .22LR builds
• Choice of stainless steel or Black Micro Slick Cerakote bolt finish

Barrel

• 4.5″ Barrel Length
• Medium Taper Profile
• 4140 Chrome Moly barrel lining
• Salt Bath Nitride Finish inside and out
• 1:16 Twist
• .22LR Sporting Chamber
• Threaded 1/2-28