The Mepro MPO-DS is an open reflex red dot sight designed for subcompact or slimline pistols. This cost-effective optic punches far above its cost. It features a 3.5 MOA red dot reticle, RMSc/JPoint footprint, automatic brightness control, CR2032 battery lasting 3 years plus while being water, shock, and fog proof. The Mepro MPO-DS allows you to upgrade your current sighting system with money left over for more ammo.RMSc FootprintAutomatic BrightnessShake Awake FeatureRed Dot 3.5 MOAIPX7 WaterproofNVD Compatible DeviceMEPROGUARD Warranty