Reviews & Ratings for Primary Arms SLx MD-25 Rotary Knob 1x25mm Microdot Reflex Sight — 41 reviews — Page 1

Great optic and clear glass. Offers great versatility on different calibers

So to start with, Opticsplanet was super with the return and refund. Printed a shipping label, UPS took it and it was all refunded within like a week of dropping it off. The reticle illumination was very dim, it could not be seen under setting 8 out of 11, this was indoors and not in even brighter sunlight and I am quite certain it wasn't that dim by design. I decided not to replace it with another because the ACSS reticle without a magnifier is completely worthless. The chevron not only is barely visible, but it is so small the dot that it appears as is barely visible let alone every other mark beneath it. I already knew about the stiff dial and can confirm yes it's stiff when it arrives new. I did like everything else about it and the risers included were able to put it at a 1/3 cowitness. I would ONLY use this ACSS with a magnifier which kind of defeats the purpose of a red dot sight over a LPVO otherwise if the red dot model has a large enough dot and was brighter than my likely defect, I'd go for that one.

Shipping was quick and easy, mounting was easy, sighting in was easy, use for intended purpose was extremely satisfying. I have had other red dots, no real complaints. But this one is quite a bit better. The shake awake is a major for me.. Thank you, OpticsPlanet.

So I have two of these and one of them looks great, the reticle is clear and sharp. The other one is fine as well except that the reticle appears noticeably crooked, about 5-10 degrees tilted left (from 12 o’clock toward 11). My rail is level and the mount looks fine, so I think it must be the optic itself. Never had that happen before so hopefully it’s a one-off, but I am disappointed with this one. Normally my experience with Primary Arms products has been top-notch.

Red dot is great! I like the 25MM Optic size bc im getting older and harder to see so this is perfect

Was easy to install, glass looked good, and I truly enjoy the "ACSS CQB". To me it's a very highly logical way to aim a firearm. Extremely quick to use. Quality was excellent. Delivery time was fast as always! A very "good value per dollar" in my eyes. I would not hesitate to purchase another, or recommend it to a friend.

I like this red dot so much that I have 2. One on a 5.56 and the other on a 300blk.

This is my 3rd Primary Arms optic. I usuay prefer etched reticle optics in case the battery dies but the price was too good to pass on this red dot.

It was mostly a panic buy due to California's new law AB1263 coming into effect Jan 1, 2026 restricting us from having accesories shipped to our home causing me to have backups for my backups. Many online retailers are simply refusing to ship anything to us out of fear of breaking this new vague law so gotta stock up and hope this law is challenged in court and reversed.

It uses a CR2032 battery which is the same as other optics, which I prefer. Again, haven't mounted it yet but will do so at a much later date.

This is the third one I've ordered.
It's a solid rugged Red dot that holds zero and works every time! You cannot get a better sight at this price!

I bought this for my .357 marlin, 1894.
And it made this gun so fun to shoot.
I got the ACSS reticle, sighted it in at 50 yards, and have no problem taking it out to 200 yards.
I also got one for my 10/22 takedown because of the unlimited eye relief.
Strongly recommend.