Hardened Arms 7.5" 5.56 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 a Melonited finish for excellent durability.
7.5" M4 Profile
Chambered in 5.56 (Will also shoot .223)
4150CMV Mil-B Spec Steel
1 in 9 Twist Six Groove Button Rifled
Pistol length gas port
Black Nitride / Melonite Finish
M4 Feed Ramps
1/2x28" Threaded muzzle
Manufactured in the US
.750" at gas block
Our 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.