Loglife Peltor Comtac I/II Headset Headphone Ops Core Helmet ARC Rail Adapter Fast Mich IBH Helmet Z3AD PELTOR New version headset adapter can match with full range of FAST helmets (BJ, PJ , MH), ACH helmet, MICH helmet , IBH helmet, as long as they have ARC rails on side. After testing, Comtac I and Comtac II headset can be combined perfectly with this headset adapter With the hanging after the Comtac intercom headset, headset will be separated out from the arc-shaped headband, used on the card directly to the hanging chain Hang buckle can be fixed to the helmet on the 2 sides of the helmet rails, after installation, the Comtac headphones headset can rotate freely. PT headset and helmet rail adapter