The Del-Ton complete upper receiver assembly features a flattop upper receiver with a 14.5" government profile chrome moly barrel. The 5.56x45mm NATO chamber, 1 in 9" twist, and M4 feed ramps ensure reliability with a wide variety of commercial and surplus ammunition. The A3 upper features a carbine length gas system and sight radius. The barrel is threaded 1/2"-28 with an A2 flash hider. Steel parts are finished with a phosphate coating, the aluminum upper is hard coat anodized.
An “AR-15 Pistol” upper assembly has a barrel less than 16” in length. Pistol uppers are only for use on AR-15 pistol lowers and legal Short-Barreled Rifles. Other configurations may violate Federal law.
Installation of AR-15 upper assemblies with certain features including, but not limited to: flash hiders, bayonet lugs, and threaded muzzles may violate state and/or local laws.