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Primary Arms SLx MD-21 Push Button 1x21mm Micro Reflex Red Dot Sight w/AutoLive
As Low As $159.99 Save 13%
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Most Helpful Negative Review Don't waste your time.
I had high hopes for this optic, but the "you tubers" were right about the emitter being a problem and causing a massive halo effect if you turn up the dot… and not even all the way. I clicked it 3 times and got this massive red bloom inside the optic. For the money, just go buy a Romeo 5 Gen 2.
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useless reticle

by Ryan Campbell, Verified Owner from OK, United States Written on September 28, 2025
I should've got the single dot model. I liked the idea of a bdc red dot but the bdc and horseshoe reticles flood the tube with red light rendering the optice completely useless. The chevron is so small ot might as well just be a dot. And the bdc dots are so close together that they just form a line. For now I'm just using the chevron only reticle as a dot until I can replace it with a romeo red dot.
Would recommend: No
2 of 5 found the following review helpful.
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Great optic with good price!

by Dan Abling, Verified Owner from OH, United States Written on June 6, 2025
Lifetime warranty and excellent product!! Highly recommend!!
Would recommend: Yes
Was it helpful to you? Yes | No
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