- Compatibility: This rail adapter works with the full range of tactical FAST helmets, ACH helmets, and MICH helmets that have OPS Core ARC side rails. - Headset compatibility: Designed for HD-19 series tactical headsets and EAR-MOR M31, M32, M30, M32H, and M32X. It suits headsets with earmuffs shaped as a raised battery compartment on tactical headsets or an inclined battery compartment on the earmuffs. - Full adjustability: The ARC helmet rail adapter can rotate 360 degrees, and the adapter position on the headset can also rotate. The bracket arm can be retracted and adjusted to a comfortable position. - Spring and swing design: The bracket uses a spring and rotation mechanism, enabling the arm to swing up and down. When not in use, the headset can be rotated to the back of the helmet to rest your ears and aid heat dissipation. - Benefits: Enables quick stowage and easy access to comms gear, reduces ear pressure during long wear, and adapts to multiple headset shapes and helmet models without removing the system. - Use scenarios: - On patrol or field operations, rotate the headset to the back during breaks or when access to equipment is needed. - During training or vehicle operations, swing the headset aside for rapid equipment access without removing the helmet. - In hot environments or long missions, rest and ventilate ears by positioning the headset to the rear for better comfort and cooling.