CMMG Barrel and Collar Kit Medium Taper Profile 22LR 9.2in. CMMG machined these AR15 Barrels from 4140 Chrome Moly steel for maximum durability. These CMMG Inc .22 Long Rifle Mk4 Barrel Kits w/ Collar also feature a salt bath nitride finish inside and out to further strengthen their build while also enhancing their resistance to corrosive elements and abrasion. Equip this CMMG Inc 22LR AR-15 Barrel and Collar Kit to ensure your rifle is performing at its full potential. Specifications for CMMG 22LR Mk4 Barrel Kits w/ Collar: Manufacturer: CMMG Color: Black Finish: Matte Fabric/Material: Steel Caliber: .22 Long Rifle Barrel Profile: Medium Taper Flutes: No Gun Make: AR Platform Gun Model: AR-15 Weight: 1 lb Condition: New Gun Frame Size: Medium Length: 9.2 in Features of CMMG Inc 22LR Mk4 Barrel Kits w/ Collar: 4140 Chrome Moly Salt Bath Nitride Finish inside and out 1:16 Twist 22LR Sporting Chamber Threaded 1/2-28 Package Contents: CMMG 22LR Mk4 Barrel Kits w/ Collar What firearm models does the manufacturer say CMMG 22LR Mk4 Barrel Kits w/ Collar is compatible with? The manufacturer suggests that CMMG 22LR Mk4 Barrel Kits w/ Collar is compatible with AR-15CMMG 22D8F24: Barrel and Collar Kit Medium Taper Profile 22LR 9.2in