CMMG Inc Barrel Sub-Assembly M4 Profile 22LR 16.1in 4140CM Salt Bath Nitride. Features of CMMG Inc Barrel Sub-assy 22lr 16inch Cm M4: 16.1" M4 Profile 4140 Chrome Moly Salt Bath Nitride Finish inside and out 1:16 Twist 22LR Sprorting Chamber Threaded 1/2-28 .750" Carbine length Journal Package Contents: CMMG Inc Barrel Sub-assy 22lr 16inch Cm M4 Specifications for CMMG Inc Barrel Sub-Assemblyy 22LR 16in: Manufacturer: CMMG Finish: Salt Bath Nitride Fabric/Material: 4140 Steel Caliber: .22 Long Rifle Barrel Length: 16.1 in Barrel Profile: M4 Barrel Twist Rate: 1-16 Gun Model: AR-15 Condition: New Package Contents: CMMG Inc Barrel Sub-Assemblyy 22LR 16in The CMMG Inc Barrel Sub-assy 22lr 16inch Cm M4 is a quality addition to the CMMG lineup. For more great deals on AR15 Barrels by CMMG please browse our CMMG Inc Gun Parts page. What firearm models does the manufacturer say CMMG Inc Barrel Sub-Assemblyy 22LR 16in is compatible with? The manufacturer says that CMMG Inc Barrel Sub-Assemblyy 22LR 16in is compatible with AR-15CMMG Inc Barrel Sub-assy 22lr 16inch Cm M4 - 22D7C0A