Compatible with MSA Sordin & TCI Liberator headsets allow you to mount your headset to your tactical helmet rail - Unique design attaches to unused rear slots of helmet rail, freeing up side rail real estate for lights, cameras, goggles, etc. - Cam locking mechanism allows for easy opening and closing - 360 degree rotating mount allows headset to be swung out of the way and stowed on back of helmet when not in use - Adjustable to multiple positions and lengths for a perfect fit - High strength yet lightweight polymer construction - Made by Armorwerx, a division of The Mercenary Company