Ade Advanced Optics RD3-009D-1 Motion Awake Red Dot Reflex Sight for Handgun with Removeable Pictinny Base

The change of new 2021 model compare to other RD3-009 is we added a cut at the rear end to make the base shorter, it allows to sit in certain 3rd party machine shop made shorter Optic Cut of custom mill slide. Full metal construction and glass. Designed in Oregon. 6MOA Red dot. Fully windage and elevation adjustable and lockable; Unlimited Eye Relief. 5 Illumination Settings. Powered by a lithium CR2032 battery(Included).Waterproof under 3ft up to 30 minutes. Shock/Fog Resistant. This red dot comes with a picatinny mounting base(included and preassembled). It is also compatible with a variety of handgun plates(not included) that replace rear sight dovetail. It is also compatible to Optics Ready pistols such as Glock MOS, Springfield OSP that use pistol manufacturer provided optic plate(not included) Ade model RD3-006,RD3-009,RD3-012,RD3-013 are designed to fit the slide/footprint of plate made for Vortex Venom,Burris Fastfire,Meopta,Docter,Insight,Eotech MRDS. Any Plate made for those brands also fits this sight. ADE RD3-018 fits footprint/cut for such as Shield RMS/RMCS. ADE RD3-019 Stingray fits Foorint/cut for Trijicon RMR. Why don’t I see a perfect round dot? Instead I see a splashed dot, half-moon shape, multi dot, starburst etc. Answer: It is very likely (99% chance) you have astigmatism that you are not aware. What you see is a small reflex of led light bulb on the lens. One simple and quick way to find out is to use your cellphone to take a photo of the dot.If you see a circle dot in the photo you took, you basically diagnosed you have Astigmatism(Because cellphone is a machine does not has human astigmatism)