The DSMR is designed to quickly attach/detach from any standard size handgun/rifle with Picatinny/Weaver rails. It features a tubeless design with a 33mm reflex lens aperture that provides a wide field of view; suitable for rapid-firing or shooting of moving targets besides normal shooting. It has a multi-reticle (4 patterns) installed. The parallax corrected and unlimited eye-relief are amazing features of this sight. Allen head screw type for windage and elevation click adjustments, with locking screw. Built-in mount (integrated rail) for standard bases, no need to re-zero when mounting the dismounted sight. Very light weight, waterproof and shockproof. Low power consumption for long battery life. It is backed with Osprey's industry leading no-nonsense lifetime warranty.Lifetime warranty; contact (470)274-5295 for warranty questions