POF USA Minuteman Upper Receiver 5.56 10.5in Barrel Carbine Length 1-8 Twist 1/2x28 9in Renegade Rail 3-prong Flash Hider Tungsten. They took it upon themselves to be trained in various weapons and tactics. We deeply admire their patriotism and self-reliance. The Minuteman is our twist on what a direct impingement serious carbine should be topped with the controls and enhancements most important to remain mobile and light. Bolt Carrier Group included. Charging Handle Included. Specifications for POF USA Minuteman 5.56 Upper Receiver: Manufacturer: POF USA Barrel Twist Rate: 1-8 Threads per Inch: 1/2x28 Muzzle Device: Three-Prong Flash Hider Finish: Cerakote Gun Model: Universal Condition: New Fabric/Material: 4150 Chrome Moly Vanadium Aluminum Steel Gun Rail: M-LOK Gun Make: Universal Bolt Carrier Group Included: MIL-SPEC Magazine Included: No Features of POF USA Minuteman 5.56 Upper Receiver Ambidextrous Strike Eagle charging handle DI bolt carrier group with our patented Roller Cam Pin Renegade Rail with patented oversized heat sink barrel nut Carbine length gas system on pistol Mid-length gas system on the rifle A proprietary 3-prong flash hider Nitride heat-treated barrel Package Contents: POF USA Minuteman 5.56 Upper Receiver Owners Manual What firearm models does the manufacturer say POF USA Minuteman 5.56 Upper Receiver is compatible with? The manufacturer says that POF USA Minuteman 5.56 Upper Receiver is compatible with UniversalPOF USA 1816: Minuteman Upper Receiver 5.56 10.5in Barrel Carbine Length 1-8 Twist 1/2x28 9in Renegade Rail 3-prong Flash Hider Tungsten