Hardened Arms 18" 556 Melonited 1/9 Barrel
Hardened Arm's barrels are made to our exacting specs right here
in the USA. Each barrel is button rifled for superb accuracy and
finished with Magnesium Phosphate for excellent durability.
18" Socom Profile
Chambered in 5.56 (Will also shoot .223)
4150 Chrome Moly Steel
1 in 9 Twist Six Groove Button Rifled
Stress relieved barrel and extension
Mid Length gas port
M4 Feed Ramps
1/2x28" 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 5.56 or .223.