ArmorMason Closed-Ear Electronic Hearing Protection & Communication Headset with Rear Helmet Rail Adapters Tactical Vests The two top screws compress

The two top screws compress the clamp around the rail when tightened

Compatible with any ACOG model that accepts the factory Trijicon RM38 mount

Motorola XiR multipin

Fits most tactical helmets (Compatible with Crye Airframe

ArmorMason Closed-Ear Electronic Hearing Protection & Communication Headset with Rear Helmet Rail Adapters Tactical Vests The two top screws compressElectronic hearing protection and two way communications headset 18dB NRR Rating Intelligent circuitry amplifies speech and other small sounds up to 18dB while automatically cutting out loud noises over 82dB Dual microphones provide 360 degree amplification and directional awareness of sound sources Powered by 2 x AA size batteries (Not Included) Hearing protection function works with or without connection to radio Mil standard Nexus TP 120 plug