Low profile, lightweight headset adapters - Slide on and lock to OPS-Core Helmet ARC Rails - Fits Howard Leight, Walker Razor, and Caldwell headsets and earmuffs with no adapters needed. - Also available with tips to fit Peltor Comtac or MSA Sordin headsets (spade ends of headset adapters will need to be trimmed for use with Sordin tips) - Can be locked open for easy donning and doffing - Can be rotated to rear for storage