The Primary Arms SLx MD-20 delivers up to 50,000 hours of runtime on a single battery.

Budget-priced gear, that can perform up to standards, remains a holy grail for shooters. To that end, Primary Arms just released its latest red dot optic, the SLx MD-20. It delivers an impressive 50,000 hours of runtime on a single battery. Better still, it should fall squarely in most budgets.

Primary Arms SLx MD-20 Details

The SLx MD-20 features an enhanced emitter, providing an ultra-bright reticle up to 50,000 hours on medium settings. The optic falls within the SLx line. Each optic in that class undergoes rigorous field-testing during development, according to Primary Arms.

The AutoLive feature provides motion-control to the illumination system. A zero-parallax lens and night vision compatibility rounds out the value-priced package.

“Early in 2020, we retired one of our best-selling red dots, MD-ADS. The time has come to replace it with the all new MD-20,” said Terry Mears, Primary Arms’ Director of Product Marketing. “This time, we’ve included a super bright high efficiency LED that provides daylight bright illumination among the 11 push button settings. Users will be impressed to find that even at the brightest setting, the sight picture is clean with no reflection or glare.”

The SLx MD-20 retails for $149.99. For even more info, please visit

Primary Arms SLx MD-20 Specs

  • Battery Life: 50,000 hours
  • Battery Type: CR2032 3V Lithium Coin
  • Brightness: 12 settings
  • Click Value: 1/2 MOA
  • Finish: Hardcoat anodized
  • Material: Aluminum, 6061 T6
  • Night Vision Compatible: Yes
  • Reticle: 2 MOA Dot
  • Reticle Color: Red
  • Size: Microdot
  • Overall Weight: 3.8 ounces
  • MSRP: $149.99

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