Faxon Firearms Match 300 BLK 6" Nitride 416-R Stainless QPQ Nitride BarrelA faster 1: 5 Twist Rate combined with the Lightweight Faxon Gunner Profile. The 300 Blackout cartridge yields increased performance in shorter barrels and effective subsonic performance. By speeding up the twist rate to 1: 5 from common 300 BLK rates of 1: 7 and 1: 8, these Faxon Match Series Gunner Barrels increase projectile stabilization and energy on target. The Gunner profile is a blend of two of the best performing profiles of all time, GOVT