GEMTECH's GMT-300BLK suppressor utilizes our patented G-Core technology. 300Blackout is a unique round that super and subsonic ammunition function differently in the same rifle. The suppressor is optimized for use with both super and subsonic ammunition in short barreled rifles. The GMT-300BLK, being a G-Core suppressor, is completely user serviceable. Suppressors have become remarkably popular in the firearms industry. Order yours through Guns.com today!