Primary Arms CLx Enclosed 1x 17mm Reflex Red Dot Sightw/ Autolive 3 MOA Red Dot Black. Its fully enclosed design protects a large 2117 mm lens while its high-efficiency emitter ensures visibility in any lighting condition. Designed around the RMSc footprint it features AutoLive illumination long battery life and an integrated back-up rear iron sight for dependability in everyday carry. Primary Arms CLx Series optics deliver dependable performance at an accessible price hand-inspected at Primary Arms headquarters in Houston Texas. Backed by the Primary Arms Lifetime Warranty against defects in materials and workmanship. Specifications for Primary Arms CLx Enclosed 1x 17mm Reflex Red Dot Sight: Manufacturer: Primary Arms Color: Black Finish: Hardcoat Anodized Fabric/Material: 6061-T6 Aluminum Magnification: 1 x Objective Window Size: 17 mm Reticle: 3 MOA Dot Illumination Color: Red Brightness Settings: 10 Emitter Type: Enclosed Battery Type: CR1632 Weight: 0.98 oz Package Contents: Primary Arms CLx Enclosed 1x 17mm Reflex Red Dot Sight Primary Arms 810052: CLx Enclosed 1x 17mm Reflex Red Dot Sightw/ Autolive 3 MOA Red Dot Black