Rainier Arms Mountain MOD2 5.56 NATO Barrel 10.5in 1/2x28 Carbine Len Black Small

Rainier Arms Mountain MOD2 5.56 NATO Barrel 10.5in 1/2x28 Carbine Len Black Small. We have brought back our Mountain Series of barrels for those of you who want the accuracy you expect from Rainier Arms in a nearly indestructible package. These barrels are made out of 4150 CMV and nitrided as well. That means these barrels will take anything you can throw at them. They are meant to be shot and shot a lot. The half-fluted profile maximizes heat dissipation and helps reduce weight. Specifications