Rosco Manufacturing Bloodline, Heavy Profile Barrel, 300 Blackout, 16" Threaded Barrel, 5/8X24 Thread Pitch, 1:8 Barrel Twist, Pistol-Length Gas System, 4150 CMV, Fits AR-15, Nitride Finish, Black

Rosco 300 Blackout barrels were developed with input from SOCOM end users and some of the original creators of the 300 Blackout caliber. Every barrel was designed to optimize the caliber's original role, being suppressor-friendly and accurate. It is Rosco's goal to deliver the performance you seek from these barrels when running subsonic or supersonic ammo (depending on barrel length). Twist rates, gas port diameters, and lengths have all been taken into account when they set out to make these. • 16 Heavy Profile Barrel;.750 Gas Block Size;Pistol-Length Gas System;1:8 Twist Rate;11 Degree Barrel Crown;Designed for Modern Carbine Usage