CMMG Barrel and Bolt Group Kit 4.5" Medium Taper 22 LR, Black Nitride - 22D5B6E

This CMMG barrel and bolt group kit converts an existing AR-15 upper receiver to .22 LR with a 4.5" medium taper chrome moly barrel featuring a 1:16 twist rate and salt bath nitride finish. The kit includes everything needed for conversion except a magazine, with 1/2-28 threaded muzzle and a sporting chamber optimized for .22 LR performance. Made in the USA with a limited lifetime warranty.