Hardened Arms 10.5" 300 Blackout Melonited 1/8 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 Melonite finish for excellent durability.
10.5" HBAR Profile
Chambered in 300 Blackout
4150 Chrome Moly Steel
1 in 8 Twist Six Groove Button Rifled
Pistol length gas system
Black Nitride / Melonite Finish
M4 Feed Ramps
5/8x24" Threaded muzzle
Manufactured in the US
.750" at gas block
.125" gas port
Our barrels are made in the USA from solid bar stock, headspaced and are ready to assemble. Gas port tuned for reliability with 300 blackout.