From Hughes Ballistics
Hughes Ballistics has introduced a 5.56-chambered 14.7-inch USGI Profile Carbine Barrel machined from 4150 Chrome Moly Vanadium steel with a Black Nitride Corrosion Resistant Finish and Black Nitride 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.
Length: 14.7 inches
Material: 4150 Chrome Moly Vanadium
Profile: Government
Finish: Black Nitride Corrosion Resistant
Gas System Length: Carbine
Gas Block Journal: .750″
Twist Rate: 1:7 inches
Rifling: 5R
Muzzle: 1/2×28 Threaded
Weight: 25oz
MSRP: $180
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