Alexander Arms AR-15 6.5mm Grendel Tactical Upper Receiver

All Alexander Arms upper receiver assemblies are fully-complete, function-tested, and ready to fire. Specifications for Alexander Arms AR-15 6.5mm Grendel Tactical Upper Receiver: Manufacturer: Alexander Arms Cartridge: 6.5mm Grendel Overall Length: 23.5 in Barrel Length: 18 in Barrel Profile: Fluted, Light Weight Gas System Length: Mid Length Barrel Twist Rate: 1-8 Threads per Inch: 5/8×24 Muzzle Device: Thread Protector Finish: Anodized Color: Matte Black Fabric/Material: Steel Gas Block Journal Size-Diameter: .875 in Handguard Length: 15 in Gun Rail: Picatinny, M-LOK Gun Type: Rifle Gun Make: AR Platform Gun Model: AR-15 Weight: 3.69 lb Condition: New Barrel Material: 416R Stainless Steel Bolt Carrier Group Included: MIL-SPEC Magazine Included: Yes Charging Handle Included: MIL-SPEC Mount Type: M-LOK Features of Alexander Arms Alexander Ar15 Tactical Upper 6.5 Grendel 18″ Black TCE Alexander Arms Hand Guard One 10 Round Magazine Package Contents: Alexander Arms Alexander Ar15 Tactical Upper 6.5 Grendel 18″ Black Bolt Carrier Group TCE Alexander Arms Hand Guard A2 Flash Hider Thread Protector