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 Footprint Automatic Brightness Shake Awake Feature Red Dot 3.5 MOA IPX7 Waterproof NVD Compatible Device MEPROGUARD Warranty