EARMOR Tactical Headset ARC Helmet Rails Adapter for 3M Peltor Comtac Headset – EARMOR STORE
Headset Adaptor set compatible with Helmet ARC Rail and Peltor Headset – DLP Tactical
Helmet Rail Adapter Kit for Headsets | HHV
Amazon.com: Tesorrio Peltor Comtac I & II ARC Adapter - Tactical Helmet Rail Suspension Mount Version for Airsoft Activities (Black) : Sports & Outdoors