SilencerCo Alpha Direct Thread Mount 5/8x24

This direct thread mount will attach the following suppressors directly to a threaded, fixed (rifle) barrel:Omega 9 K / Omega 45 KOctane 9 / Octane 45 / 45 KHarvester 300This thread mount is not for use on pistols with unlocking or moving barrels. Using this mount on a pistol can result in damage to the suppressor.