1.This is a rugged, lightweight allmetal night vision Jarm for AN/PVS14 and Nocturn Industries UANVM 'TANTO' monoculars. It includes a swivel knuckle for tight attachment to helmets and also allows the monocular to be temporarily removed from the eye. 2.With a total weight of only 1.0 ounce, this night vision Jarm is constructed entirely of highperformance 7075T6 aluminum alloy for industryleading durability. A great companion for your hunting and shooting. 3.The intuitive friction mechanism allows the user to position the monocular in front of the left or right eye with perfect interpupillary distance adjustment, while the slight setback of the inner arm helps position the monocular eyepiece closer to the eye and provides greater compatibility for users wearing larger helmets. 4.This night vision Jarm also features a lanyard point at the rear to secure the entire system. Attach the monocular, snap the entire assembly into the dovetail helmet mount and enjoy. An advanced accessory for your tactical equipment.