Tactical helmet OPS CORE rail ARC track adapter COMTAC bracket for Peltor COMTAC I II III series noise reduction headphones BK|Intercom Accessories| - AliExpress
ARC Rail Adapter Fast Ops Core Helmet ARC Rail Airsoft Military Tactical Headset Accessories for Peltor COMTAC Headphones|Earphone Accessories| - AliExpress
3M Peltor Comtac III Arc Rail Adapters Installation - YouTube
3M Peltor ARC Adapters, Left & Right Side Attachment Kit - MOD Armory
Headset Adaptor set compatible with Helmet ARC Rail and Peltor Headset – DLP Tactical
Amazon.com : Peltor Comtac I & II ARC Adapter - Tactical Helmet Rail Suspension Mount Version for Airsoft Activities Ear Protection (Black) : Sports & Outdoors