CMMG Barrel and Bolt Group Kit 4.5inch MT 4140CM 22LR

The CMMG Barrel and Bolt Group Kit 4.5-inch MT 4140CM 22LR is a precision conversion solution designed for shooters looking to transform their platform rifle into a reliable .22 Long Rifle trainer or low-recoil practice tool. This kit is particularly useful for training new shooters or reducing ammunition costs during extended range sessions.

Constructed from 4140 chrome-moly steel, the barrel and bolt group assembly ensures durability and consistent headspacing, which are critical for achieving .22 LR accuracy. The 4.5-inch barrel length provides a compact profile while maintaining sufficient velocity and sight radius for effective target work at typical training distances.

This kit is ideal for experienced shooters and armorers maintaining AR-platform rifles, allowing for quick installation and removal of the integrated bolt group design. This feature is essential for conducting mixed-caliber training scenarios or transitioning between primary and secondary weapon systems.