13.75" 5.56 SOCOM Profile Mid-length AR 15 Barrel

Our 5.56 chambered 13.75 inch SOCOM 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. 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 13.75" 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 1/2x28 Threaded