M2 Armament Group AR-15 Group 10.5in 5.56 NATO Upper Assembly Black

M2 Armament Group AR-15 Group 10.5in 5.56 NATO Upper Assembly Black. 5" 5.56 NATO Complete Upper Receiver Group. Purpose-built for tactical operators SBR/AR-pistol builders and close-quarters armorers this compact upper assembly is engineered to deliver duty-grade reliability fast target indexing and rapid heat dissipation in confined spaces. Specifications for M2 Armament Group AR-15 Group 10.5in 5.56 NATO M-Lock Upper Assembly: Manufacturer: M2 Armament Group Caliber: 5.56x45mm NATO Barrel Length: 10.5 in Barrel Profile: M4 Gas System Length: Carbine Length Barrel Twist Rate: 1-7 Firearms Threads Per Inch: 1/2x28 Handguard Type: Free-Float Muzzle Device: A2 Flash Hider Finish: Anodized Color: Black Gun Model: AR-15 Fabric/Material: 7075-T6 Aluminum Gas Block Journal Size-Diameter: .750 in Gun Rail: M-LOK Gun Type: Rifle Gun Make: AR Platform Barrel Material: 4150 Chrome Moly Vanadium Gas System Type: Direct Impingement Bolt Carrier Group Included: No Magazine Included: No Package Contents: M2 Armament Group AR-15 Group 10.5in 5.56 NATO M-Lock Upper Assembly What firearm models does the manufacturer say M2 Armament Group AR-15 Group 10.5in 5.56 NATO M-Lock Upper Assembly is compatible with? The manufacturer suggests that M2 Armament Group AR-15 Group 10.5in 5.56 NATO M-Lock Upper Assembly is compatible with AR-15M2 Armament Group M2-TRIGGER-DRP: AR-15 Group 10.5in 5.56 NATO Upper Assembly Black