Check the listing for details. DLP Tactical Helmet ARC Rail Adaptor Set for Peltor Comtac Headset. Color: Black, Condition: New. Listed at 69.95 USD. DLP Tactical Helmet ARC Rail Adaptor Set for Peltor Comtac Headsets Fits standard ARC Rail equipped helmets ( OPS-Core FAST, Crye AirFrame, etc.) Color - Black Attach your Peltor Comtac or similar communications headsets directly to your ARC rail eqipped helmet series accessory rails. (Will also fit most other 3M / Peltor Comtac hearing protection earmuffs with similar headband mounting posts)Drastically improves the comfort and protection of your helmet by eliminating the rigid metal headband, you no longer have to fight for space inside your helmet or remove helmet pads to fit a headset.Rotating design allows headset to swing up and out of the way when not in use and facilitates rapid donning or doffingInstalls in seconds on ARC rail and replaces existing headband, no permanent modification to headset or helmet requiredProudly made by DLP Tactical