The Shield Compact RMSc is the slimmed down version of the popular RMS red dot sight. The RMSc (Reflex Mini Sight Compact) is small enough to fit discreetly on any subcompact gun, tough enough to withstand the harshest recoil and light enough that you won't even feel it's there. The matte black RMSc is machined from strong aerospace grade aluminum and weighs 0.61 ounces. It features automatic brightness adjustment to adapt to your environment allowing you to concentrate on the target not your front sight. Battery Life: 22000 hours Night Vision Compatible: Yes Power Supply: CR 2032 Reticle: 4 MOA Red Dot Shield designed the RMSc to Mfg: Shield Sights Ltd.