TacFire AR Barrel BAR30018N is a 16-inch AR-15 barrel finished in black nitride and chambered in .300 Blackout. It features a 1:8 twist and is designed for standard AR-15 platform compatibility. Manufactured by TacFire, this barrel is suitable for upgrading or replacing your AR-15 barrel with compatibility for .300 AAC Blackout cartridges. Specs include 16-inch length, 1:8 twist, nitride finish, and AR-15 chambering. Weight approximately 1.92 lb.