Primary Arms SLx RS-10R 1x23mm Mini Reflex Red Dot Sight 3 MOA Dot Reticle Black. The optic also switches to a side-loaded CR1632 battery while maintaining the compact reliable design that our users expect. Specifications for Primary Arms SLx RS-10R 1x23mm Mini Reflex Red Dot Sight: Manufacturer: Primary Arms Color: Black Magnification: 1 x Objective Lens Diameter: 23 mm Reticle: 3 MOA Dot Illumination Type: LED Illumination Color: Red Adjustment Click Value: 1 MOA Battery Type: Lithium Metal CR2032 Weight: 1.1 oz Red Dot Sights-Footprint: RMR Package Contents: Primary Arms SLx RS-10R 1x23mm Mini Reflex Red Dot Sight Battery Primary Arms 810045: SLx RS-10R 1x23mm Mini Reflex Red Dot Sight 3 MOA Dot Reticle Black