The innovative AMP™ Helmet Arms attach to the rear rails and cantilever the headset forward over the operator's ears rather than the traditional top-down attachment. This frees up the top rails for other mission critical gear like lights and cameras. However, the factory OEM configuration will only interface with genuine Ops-Core® ARC™ rail; until now. Platform Adapter retrofit installation can be done in minutes and brings the same strength and performance to some other popular tactical helmets. There is no loss in functionality.