16" 5.56 USGI Profile Mid-length AR 15 Barrel Non Threaded Muzzle

Our 5.56 chambered 16 inch USGI Profile mid-length Barrel is machined from 4150 Chrome Moly Vanadium steel with a Black Nitride QPQ Corrosion Resistant Finish and Black Nitride QPQ Corrosion Resistant coated M4 feed ramp extension. This non-threaded muzzle version of our sub-MOA 16" barrel is designed for States requiring a full 16" barrel length and doesn't require pin and welding of a muzzle device to comply  4150 has a 0.50% carbon content and is used for barrels that need to be tougher, have more strength, and higher hardness than 4140 or 4130 can provide. It's a little less common and takes a little extra effort to machine but produces the right results. Additional Info Length 16" Material 4150 Chrome Moly Vanadium Profile Government Finish Black Nitride Corrosion QPQ Resistant Gas System Length Mid-length Gas Block Journal .750" Twist Rate 1:7 inches Rifling 5R Muzzle Non Threaded Weight 31oz