GC_UPC CMMG 22D7C6C Replacement Barrel Kit with Bolt Carrier Group, 22 LR 16.10" Threaded, Black Nitride Chromoly Steel, Fits AR-15/Mk4 $303.55 22D7C6C show more like this Calculated in Cart Classic Firearms GC_UPC CMMG 22D7C6C Replacement Barrel Kit with Bolt Carrier Group 22 LR 16.10" Threaded Black Nitride Chromoly Steel Fits AR-15/Mk4 $304.83 22D7C6C show more like this $10.95 flat rate GunStuff TV GC_UPC Cmmg 22D7c6c Replacement Barrel Kit With Bolt Carrier Group, 22 LR 16.10" Threaded, Black Nitride Chromoly Steel, Fits Ar-15/Mk4 $305.87 22D7C6C show more like this Firearms $18.45, Free over $500 Shooting Surplus GC_UPC Cmmg .22lr Barrel & Bolt Group Kit M4 - Barrel And Bolt Group Kit 16.1" .22lr Fits Ar15 /M4 $312.99 22D7C6C show more like this additional Brownells