Bbl assembly SFS 300 Blackout

These barrels are machined from 4150 Chrome Moly Vanadium 11595E steel and include a Melonite QPQ finish inside and out. The Melonite finish offers protection against rust and corrosion as well as extending the life of the barrel.  The rifling is a right hand twist and the twist rate is caliber specific.

Twist Rate:

300 Blackout is 1/7