The RTS2R's has a removable Picatinny or Weaver style rail mount, so the sight can be direct mounted or utilize the various STS mounting kits. Just like our competition sights, the RTS2R head up display provides an unobstructed sight picture in which the red dot hovers on the sight line, illuminating the point of impact on the target, creating the fastest target acquisition in existence and unlimited eye relief. Similarly it uses a beam-splitter lens made of glass. hard coated for maximum scratch resistance and light transmission, while the parallax free design enables targets to be acquired without the need to center the dot in the lens. The RTS2R uses a CR2032, lithium battery that is contained within a removable battery tray, which permits battery replacement without dismounting the sight. this eliminates the need for re-zeroing when replacing a battery. The battery tray is O-ring sealed and is part of the waterproofing that goes into every RTS2R. A 10-position push button switch provides manual intensity adjustment. automatic return to the previous brightness setting on start up. and an off position. The RTS2R aircraft alloy housing and electronics are designed to handle the hottest loads from large caliber firearms. The RTS2R provides 1 moa click adjustments for windage and elevation resulting in pinpoint accuracy. A positive locking screw for both windage and elevation lock the adjustment screws in position..