CMC Triggers AR-15 5.56x45mm NATO Threaded AR Barrel 7.5in SOCOM Pistol Length 1-7 Twist 1/2x28 H&M Blacknitride+ Black. 56 NATO 7.50" Chrome Moly Vanadium Steel Button Rifle - Specifications for CMC Triggers AR-15 5.56x45mm NATO Threaded AR Barrel: Manufacturer: CMC Triggers Color: Black Finish: H&M BLACKNITRIDE+ Barrel Length: 7.5 in Barrel Profile: SOCOM Gas System Length: Pistol Length Gas Block Journal Size-Diameter: .750 in Barrel Twist Rate: 1-7 Barrel Material: 4150 Chrome Moly Vanadium Gun Make: AR Platform Gun Model: AR-15 Weight: 1.02 lb Gas Block Journal Size-Length: 1.13 in Gun Type: Rifle Firearms Threads Per Inch: 1/2x28 Length: 7.5 in CMC Triggers BBL556001 5.56 NATO 7.50" Chrome Moly Vanadium Steel Button Rifle What firearm models does the manufacturer say CMC Triggers AR-15 5.56x45mm NATO Threaded AR Barrel is compatible with? The manufacturer suggests that CMC Triggers AR-15 5.56x45mm NATO Threaded AR Barrel is compatible with AR-15CMC Triggers BBL556001: AR-15 5.56x45mm NATO Threaded AR Barrel 7.5in SOCOM Pistol Length 1-7 Twist 1/2x28 H&M Blacknitride+ Black