Please ensure that the RMR Glock Mount matches your Glock. If there is no screw hole in the middle of the slot of your gun, The mount of this RMR will not fit. The item "MINI RMR RED DOT SIGHT COLLIMATOR GLOCK REFLEX SIGHT SCOPE FIT 20MM WEAVER RAIL" is in sale since Friday, May 29, 2020.This item is in the category "Sporting Goods\Hunting\Scopes, Optics & Lasers\Red Dot & Laser Scopes". The seller is "firewolfhunting" and is located in Jamaica, New York. This item can be shipped worldwide.