Works as advertised - UTG Pro OP3 Micro Red Dot Sights - Reflex1x 4 MOA Single Dot

Bright green dot, a bit of a halo if you make it too big. I used a small jewelers hammer to the mounting plate to get proper fit into the rail, very tight on my Rock Island 22Magnum pro with a factory installed picatinny rail. It is the perfect size and easy to use. Holds true on this gun although i can’t speak for a larger caliber hand gun as thus one has little to no recoil. It does not have auto shut off so you need to look through the lens to be sure you held the button long enough to shut down.