The OSM (ODIN Works Suppressor Mount) 5 serves as a proprietary mount for the ODIN Works BRIMSTONE suppressor. The OSM 5 also serves as a stand-alone compensator greatly reducing both recoil and muzzle rise getting you back on target for faster follow up shots. – Machined from stainless-steel then heat treated the OSM provides maximum strength and reliability under even the most unforgiving circumstances. The black nitride treated collar provides a highly corrosion resistant hardened finished. With no shims or washers needed the OSM is easily installed using a ¾” wrench tightened to 35 foot-pounds. – Technical Specs – FITS: AR15 and variants with 1/2-28 muzzle threads – MOUNTS: ODIN Works BRIMSTONE 5.56 (.223) suppressor