BRN 16A4 20" Upper Receiver

Color: Black Barrel Contour: Government Barrel Length: 20.00 Attachment Type: Direct Mount Finish: Anodized Cartridge: 5.56x45 NATO Muzzle Device Diameter: 0.96 Item Length (Inches): 31.000 Gas Block Diameter: 0.750 Inches Gas System Length: Rifle Receiver Style: Complete Item Weight (lbs): 5.450 Hand: Right Material: Aluminum Item Height (Inches): 4.000 Kit: Full Item Width (Inches): 2.500 Muzzle Threads: 1/2"x28 Make Model Fit: AR-15.Universal Quantity: 1 Model Number: BRN-16A4 Twist: 1-7