DLP Tactical Helmet ARC Rail Adaptor Set for MSA Sordin Headsets Attach your MSA Sordin or similar communications headsets directly to your Tactical Helmet ARC accessory rails. (Will also fit most other MSA hearing protection earmuffs with similar headband mounting posts) Drastically improves the comfort and protection of your helmet, 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 Installs in seconds on any mil-standard ARC rail and replaces existing headband, no permanent modification to headset or helmet required Proudly made by DLP Tactical