The Shield Sights AMSc Advanced Mini Compact Red Dot Sight features an enclosed emitter that's ideal for narrow-frame and single-stack pistols. The sleek build pairs with the iconic Shield footprint to provide backwards and forwards compatibility. The aerospace aluminum body delivers durability in a lightweight package, while the glass window ensures crystal-clear images. Its nitrogen-sealed housing is rated to IP68 water resistance, even submersible up to 30' for as long as 30 minutes, delivering the tough performance you need to withstand any weather. The magnification-free lens is truly a 1x lens, and automatic brightness ensures you don't have to mess with buttons to get the visibility you need, plus it allows for 12-level manual adjustment if that's your desired method. The red LED has a 4MOA and 8MOA option. Coated with anti-reflective, color-free finish. Powered by a single 3V lithium metal battery, CR2025, 2032, or 2050 battery so you can get the performance you want. Runs up to 20,000 hours in average daylight usage with a CR2032 battery. Co-witness capability. Perfect for narrow-frame and single-stack pistols Shield footprint has over 100 mounting solutions Aerospace aluminum construction Crystal-clear glass window Nitrogen-sealed IP68 water protection Magnification-free lens with color-free, anti-reflective coating Automatic brightness with 12 levels of manual adjustment Red LED with a 4MOA and 8MOA option Accepts multiple battery types Co-witness capability