Swampfox OKS00122-2: The Kingslayer is a super compact, highly accurate micro reflex open red dot sight that allows for fast target acquisition with both eyes open while focusing through to the target. It is an RMR-compatible footprint for reciprocating pistol slides . For rifle or shotgun platforms, Kingslayer comes with a low profile 1913 Mil-Std Picatinny mount already installed. Kingslayer is waterproof, fog resistant and features a scratch resistant, anti-glare lens coating. Built like a tank, Kingslayer can withstand 800 g's of impact and maintain zero come what may. This model features the red dot reticle with a rudy red/silver lense coating to maximize light transmission.