Hardened Arm's barrels are made to our exacting specs right here
in the USA. Each barrel is button rifled for superb accuracy. We start with 4150 CMV steel and run a QPQ (Black Nitride) to maintain the highest quality and standards.
Barrel Specs: 18" Socom Profile Chambered in 6.5 Grendel 4150 Chrome Moly Steel 1 in 8 Twist Six Groove Button Rifled Stress relieved barrel and extension Carbine gas port Melonited Finish Chrome lined chamber/bore M4 Feed Ramps 5/8x24" Threaded muzzle Manufactured in the US .750" at gas block
barrels are made in the USA from solid bar stock, headspaced and are
ready to assemble. Gas port tuned for reliability with 6.5 Grendel.