The X Ring Rail-mounted Data System, or RDS, was designed to conveniently locate your ballistic data in a position that can be viewed without moving out of your shooting position. It is simple to position and doesn't move under recoil. It also folds out of the way for ease of storage when not in use. The lightweight reinforced crystalline polymer bodies, along with stainless steel and brass fasteners, make it durable and able to withstand chemicals and weather conditions. Simply position the RDS on your Picatinny rail and tighten the socket head cap screws. The friction pivot joints are pre-set and should not require adjustment. Ballistic data can be recorded on the provided blank DOPE cards, or written directly on the vinyl protective sleeve with either a wet erase pen, map pen, or grease pencil. Features Comes with three cards, 10 piece card pack available at time of purchase or sold separately! Mounts directly to Picatinny rail Low profile - will fit under low optics Lightweight yet strong reinforced crystalline polymer bodies Stainless steel and brass fasteners Friction pivot joints hold in any position Chemical and corrosion-resistant Designed, manufactured, and assembled in USA Made in the USA ... https://www.youtube.com/watch?v=rouf4hTHtD4

The Ethos has been combat proven in some of the most fierce fighting in recent history by US Special Operations Forces. Designed from the ground up in a collaborative development process with current and former US S.O.F. and FBI Tactical personnel, the Ethos incorporates patented technology (US Patent No. 9,122,079) that enables the slim, flat, and highly flexible earpieces to conform to the wearer’s head, making fit and comfort under communications headsets and helmets unmatched. When worn without headgear, the titanium alloy earpiece struts provide structure and secure retention to the head. https://www.anarchyoutdoors.com/arclite-optics/ ... https://www.youtube.com/watch?v=wuNdDU_s4vo