CMMG Mk4 5.56X45mm NATO Banshee Upper Group Receiver 12.5in Coyote Tan

CMMG Mk4 5.56X45mm NATO Banshee Upper Group Receiver 12.5in Coyote Tan. 5 5.56mm BANSHEE upper group with the Mk4/standard AR15 lower group of your choice to create a compact AR pistol or SBR that blends maneuverability with carbine like ballistic performance. Specifications for CMMG Mk4 5.56X45mm NATO 12.5in Banshee Upper Group Receiver: Manufacturer: CMMG Caliber: 5.56x45mm NATO Overall Length: 20.8 in Barrel Length: 12.5 in Barrel Profile: Medium Gas System Length: Carbine Length Barrel Twist Rate: 1-7 Threads per Inch: 1/2×28 Muzzle Device: CMMG Zeroed Linear Compensator Fabric/Material: 6061-T6 Aluminum Gas Block Journal Size-Diameter: .750 in Gun Rail: M-LOK Gun Make: CMMG Gun Model: CMMG Mk4 Weight: 3.8 lb Magazine Included: No Mount Type: M-LOK Package Contents: CMMG Mk4 5.56X45mm NATO 12.5in Banshee Upper Group Receiver What firearm models does the manufacturer say CMMG Mk4 5.56X45mm NATO 12.5in Banshee Upper Group Receiver is compatible with? The manufacturer says that CMMG Mk4 5.56X45mm NATO 12.5in Banshee Upper Group Receiver is compatible with CMMG Mk4CMMG 55BDFF4-CT: Mk4 5.56X45mm NATO Banshee Upper Group Receiver 12.5in Coyote Tan