USED Shield Sights Enclosed Emitter Reflex Red Dot Sight- 8 MOA- Auto and Manual Brightness Waterproof 3 Battery Sizes Black AMS-8 Moa. The AMS was conceived by smashing together the best features of two military proven Shield Sights the SIS (NSN-1240-99-176-8362) and the RMSw (NSN-1240-99-490-5863) both sights bought by UK special forces. Specifications for Shield Sights AMS Enclosed Emitter 1x21.85mm Reflex Red Dot Sight: Manufacturer: Shield Sights Color: Black Fabric/Material: Areospace Grade Aluminum Magnification: 1 x Objective Lens Diameter: 21.85 mm Illumination Type: LED Illumination Color: Red Eye Relief: Unlimited Emitter Type: Enclosed Battery Type: Lithium Metal CR2032 Weight: 1.28 oz Red Dot Sights-Footprint: RMS Features of Shield Sights AMS Enclosed Emitter 1x21.85mm Reflex Red Dot Sight Mounts to SHIELDs famous footprint. Utilizes SHIELDs 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. Large crystal-clear 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. Intelligent on/off function allowing the user to turn it back on at the previous setting. 12-stage manual brightness adjustment including 3 NVG settings. 3-stage auto brightness adjustment so it can always be on and ready. Nitrogen-sealed housing submersible to 30 feet for 30 minutes. Industry-first mounting interface for fitting aftermarket accessories like a roll cage torches lasers GoPro protective lens covers and more. Package Contents: Shield Sights AMS Enclosed Emitter 1x21.85mm Reflex Red Dot Sight Shield Sights AMS-8 Moa: Enclosed Emitter Reflex Red Dot Sight- 8 MOA- Auto and Manual Brightness Waterproof 3 Battery Sizes Black