SLx optics built Primary Arms reputation for innovation, reliability, and value. all SLx optics undergo rigorous field testing during development to best serve you in any environment. the SLx MD-20 incorporates some of the most advanced red dot sight technologies available in the industry. the 20mm aperture is crystal clear, providing ample edge-to-edge field of view without a blue tint. 2 night vision settings make this dot versatile in low light applications. one battery provides 50,000 hours of runtime on a medium setting  but this duration is extended with autolive motion sensing technology, which automatically regulates output when the optic is not in use.

aperture diameter: 20mm

length:2.35" 

weight: 3.8oz.

windage and elevation adjustment: 40 MOA

battery life: 50,000 hours

illumination: daylight visible

lifetime warranty