These 3M™ PELTOR™ ARC Adapters and CGS Conversation Kit for M-LOK allow you to mount Peltor and other headsets to M-LOK helmet rails. The pop out feature allows the user to "pop" the headset off the ears for venting and donning. They allow the user to seamlessly integrate hearing protection headsets or communications systems (headset guide) directly onto helmet rails. This eliminates the need for an uncomfortable strap underneath the helmet that eventually creates hotspots and headaches.***Ensure you watch the install video! Depending on your head shape you may need to bend the wires to achieve the best seal with your head sets.***