The Meprolight MPO-S Green 3/33 MOA Bullseye Open Pistol Sight is a featherlight, ultra-slim reflex optic purpose-built for RMSc-footprint compact and subcompact carry pistols, offering a user-selectable green reticle system with a 3 MOA dot, 33 MOA bullseye, and 33 MOA ring. With 12 brightness levels including 2 night vision-compatible settings, Shake Awake activation, side-loading battery tray, and 20,000+ hours of runtime on a single CR1632, it packs serious features into one of the lightest packages on the market. At just 0.8 oz and rated IPX7 waterproof and fog proof, the MPO-S Green is the ideal everyday carry optic upgrade for any RMSc-cut pistol. Meprolight USA MPO-S Green 3/33 MOA Bullseye Open Pistol Sight w/RMSc Footprint 901141181