Shield Sights AMSc Red Dot Sight - 4MOA - Following the release of the AMS, comes the latest offering from SHIELD: the AMSc. Expanding the range of enclosed emitter products, the AMSc offers a host of features similar to its big brother but in a scaled-down package, aimed at narrow-frame or single-stack pistols for EDC and concealed carry requirements. Utilizing our unique SHIELD footprint ensures forward and backward compatibility with existing firearm installations and accessories. A newly designed aerospace-grade billet aluminum body provides a host of features not normally found in a micro-compact product. No-click adjustment allows for much more accurate zeroing with wider limits of elevation and windage. Multiple battery tray options allow for a choice of battery capacity to increase operational life or reduce the overall profile of the housing. A nitrogen-sealed housing, submersible to 30 feet for 30 minutes, ensures all-weather capability with zero user interaction required. Benefiting from multiple patents, the AMSc is still able to offer co-witnessing using our hollow bridge rear sight design and remains watertight while being one of the smallest and most attractive enclosed sights on the market. Mounts to SHIELD's famous footprint; Utilizes SHIELD's patented mechanism, enabling co-witnessing with standard iron sights, considerably reducing training times and costs; The mechanism uses no click adjustment, making it infinitely more accurate when zeroing; Square, crystal-clear glass lens with no filters to disturb the image of the world through the sight; Machined from aerospace-grade aluminium to extremely precise tolerances while maintaining an attractive, modern-looking optic; Smallest and lightest in its class, weighing only 27.1g (battery excluded); Automatic brightness adjustment, so it can always be on and ready; 20,000 hours in average daylight with a CR2032; Side access battery compartment with the option of a CR2025, CR2032, or CR2050 battery, offering the user a choice of better battery life or increased concealability; Nitrogen-sealed housing, submersible to 30 feet for 30 minutes;