Meprolights microRDS brings the rapid target acquisition of a full-size red dot rifle optic to a compact pistol sight. Featuring a patented quick-detach (QD) adaptor kit. Its the only red-dot solution that instantly mounts and dismounts without having to re-zero, with an adaptor that also gives you a Meprolight TruDot self-illuminated sight as a back-up when the red dot optic is removed. Built to mount in minutes to any pistol with red dot capability. It also serves as an excellent close-quarters red dot sight and backup sights for rifles and shotguns.Features : One sight fits multiple firearms - handguns (both classic and optics ready), rifles, and shotguns Clear aiming point for all light conditions Patent -Quick Detach (QD) Adaptor - keeps the sight zeroed at all times Battery replacement does not require removal of sight from gun mounts