FeaturesH&R delivers another clone when you need it most. This M16A2 build is ready to outshoot everyone. The M16A2 is a lightweight air-cooled gas-operated magazine fed American Classic. First adopted by the United States Marine Corps in 1983 it soon was adopted by all 4 branches of the Military. You may still find a few M16A2 rifles floating around arms rooms today at your local National Guard Armory. As always these are made from the highest quality US Made parts by our most experienced armorers.DetailsCaliber: 5.56 NATOBarrel Length: 20"Barrel Profile: A2Barrel Finish: ParkerizedChrome Lining: YesMuzzle Thread: 1/2" x 28Twist: 1:7Barrel Extension: M4Gas System Length: RifleDiameter at Gas Block: .750"Gas Block Type: Standard F HeightMuzzle Device: A2 Flash HiderReceiver Material: Forged 7075-T6Upper Receiver Type: M16A2 with Feed RampsHandguard: Premium USGI M16A2 with Heat ShieldsBolt Material: Carpenter 158 Steel ChromeBolt Carrier Profile: Full Auto with SerrationsOverall Length: 30"Finish: Black Anodized