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Great optic - Primary Arms SLx MD-21 Push Button 1x21mm Micro Reflex Red Dot Sight w/AutoLive

by mk, Verified Owner from FL, United States Written on February 11, 2026
Review for Primary Arms SLx MD-21 Push Button 1x21mm Micro Reflex Red Dot Sight w/AutoLive
Primary Arms SLx MD-21 Push Button 1x21mm Micro Reflex Red Dot Sight w/AutoLive
Primary Arms SLx MD-21 Push Button 1x21mm Micro Reflex Red Dot Sight w/AutoLive
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mk's Review of Primary Arms SLx MD-21 Push Button 1x21mm Micro Reflex Red Dot Sight w/AutoLive

Picked this up recently and I’m impressed. The glass is clear, and the push-button controls are much more tactile and easier to use than a dial. It holds zero perfectly after several hundred rounds. For the price point, the build quality is hard to beat.
Would Recommend: Yes
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Last updated 2026-02-12 UTC.