Lightweight - 93 g without mount and 136 g with mount and flip-up lens covers; ACET technology allows 50,000 hours of operation on one battery; Improved optics to increase the light transmission, the red dot is more distinct and clear; See through flip-up lens covers to make sure your optical lenses are always dry and clean; Fully waterproof; Patent pending mount is keyed to the sight body to absorb recoil; Stainless steel "helicoil" threads to prevent damaging of threads of the mount; Precision adjustment for windage and elevation: top of protective caps fits into holes on adjustment screws - no other tool required; 12 settings for use in daylight and low light conditions; Sight, LRP Mount, 39mm Spacer are sold as a complete kit