Ar-15 Barrel Assemblies 22lr - 4.5 Barrel Sub-Assembly W/ Collar Kit 22lr

Perfect for building your custom dedicated 22LR AR-15 upper group. Also Includes barrel collar to replace the chamber adapter on your 22AR Conversion. Available as: 4.5" Barrel available with or without a Collar Kit Medium Taper Profile 4140 Chrome Moly Salt Bath Nitride Finish inside and out 1:16 Twist 22LR Sprorting Chamber Threaded 1/2-28" Available as: 16.1a ^2 Barrel available with or without a Collar Kit M4 Profile 4140 Chrome Moly Salt Bath Nitride Finish inside and out 1:16 Twist 22LR Sprorting Chamber Threaded 1/2-28 .750a ^2 Carbine length Journal Or Ava Mfg: Cmmg