Primary Arms Micro Reflex Sight Features The Primary Arms Micro Reflex Sight is housed in 6061 aluminum for a durable hardcoat anodized finish that resists the wear of daily holster carry. Its square lens profile delivers an unobstructed field of view despite the compact 21x15mm window giving the shooter a clear sight picture the moment the pistol is presented. AutoLive technology automatically powers the sight off when it sits still and instantly back on at the slightest motion conserving the CR2032 battery without requiring the shooter to think about it. With the battery mounted on the bottom of the housing the shooter gets up to 40 000 hours of runtime on the medium brightness setting. Ten total illumination settings let the shooter match the dot s intensity to anything from a dim indoor range to bright daylight and the fully multicoated lens resists scratching and fogging across those conditions. The RMSc footprint gives the sight wide compatibility with milled slides and adapter plates already in common use on compact and micro-compact pistols. Because the lens sits at a slightly smaller 21mm size than Primary Arms Mini Reflex Sight the housing keeps a slim profile that avoids overhang on smaller slides. Built for serious everyday carry the Primary Arms Micro Reflex Sight is a dependable green dot optic for sale at GrabAGun. Primary Arms Micro Reflex Sight Specifications Manufacturer: Primary Arms Model: Micro Reflex Sight Type: Reflex Sight Reticle: 3 MOA Green Dot Objective: 21mm Material: Aluminum Finish: Hardcoat Anodized Color: Black Mount Footprint: Shield RMSc Brightness Settings: 10 Settings Battery: CR2032 3V Lithium Battery Life: 25 001-50 000 hrs Optic Coating: Fully Multi Coated Weight: 0.56 oz Click Value: 1 MOA Available At: GrabAGun