CMMG Barrel and Bolt Group Kit, 16.1" M4, 22 Long Rifle
Everything you need to convert your existing upper to a dedicated .22LR. Just purchase a magazine and you are ready to go.
Features and Specifications:
Manufacturer Number: 22D7C6C
4140 Chrome Moly
Salt Bath Nitride Finish inside and out
22LR Sprorting Chamber
.750" Carbine length Journal