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Primary Arms SLx 3x MicroPrism Red Dot Sight
$399.99 $349.99 Save 13%
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Most Helpful Positive Review Best optic in it's class/price range HANDS DOWN!
At only 8 oz overall weight, this optic is no heavier than your average red dot, yet it offers the enhanced range and accuracy potential of a magnified optic. It has 13 brightness settings (3 of which are NV-compatible). Glass is crystal-clear! It is built rugged and appears to be capable of withst...
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Most Helpful Negative Review I received a bad copy. Zero is out of range.
I like the overall product. Good build quality, clear glass, ok eye relief, looks great. However, I must have received a bad copy. Zero is at the right-most of the adjustable range. I tested on 2 AR's - 1 barely reached zero while I cannot rotate the knob any more; the other was still 1-2 MOA away ...
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absolutely fantastic

by MMoney, Verified Owner from VA, United States Written on March 11, 2026
Fantastic optic! The 3X requires you to mount it as close as possible to the charging handle if you are ok with that go for it but don’t expect to install it in the center if your upper receiver bc you won’t be able to see through it
Would recommend: Yes
Was it helpful to you? Yes | No

great AK optic

by Leadfarmer, Verified Owner from SC, United States Written on February 14, 2026
The PA 3x prisms are the only thing I’d run on a AK at this point. Hits to 500 without issue. Great glass at a fair price. Not an acog… but nowhere near acog money either
Would recommend: Yes
Was it helpful to you? Yes | No

Great Optic

by Nasty Nate, Verified Owner from AZ, United States Written on February 5, 2026
Great optic. Glass is clear, plenty of adjustment, the BDC holdover lines can be difficult to see in the right conditions.
Would recommend: Yes
Was it helpful to you? Yes | No

PA SLx 3x micro prism

by Grizzly88, Verified Owner from KY, United States Written on February 1, 2026
Awesome optic hands down better than a reddot. Its crisp makes it very easy to be extremely precise.
Pros:
  • Quality and crisp clear optic
Cons:
  • Nice eye relief but you do have that to work around unlike a reddot
Best Used for:
  • Ar pistol under 100yrd
Would recommend: Yes
Was it helpful to you? Yes | No

Optics Planet

by Walt ZB, Verified Owner from CT, United States Written on January 20, 2026
Great scope, great outfit to deal with. Had to return another scope and opted for store credit. Was handled without problem.
Would recommend: Yes
Was it helpful to you? Yes | No

Great Optic

by BandAid4, Verified Owner from FL, United States Written on January 16, 2026
Awesome little piece of equipment. Clear glass and easy to install.
Would recommend: Yes
Was it helpful to you? Yes | No

Amazing X3 prism optics

by John, Verified Owner from TX, United States Written on January 11, 2026
This micro prism red dot is extremely well built and the mounting option mounts makes a HUGE difference on eye relieve which is great. Optics are clear and crisp! Highly recommend this optics on AR platform.
Pros:
  • Amazing optics for the price.
Cons:
  • na
Best Used for:
  • AR in my opinion
Would recommend: Yes
Was it helpful to you? Yes | No

great glass, clear

by Sloughfest, from FL, United States Written on January 10, 2026
Not enough time with it yet, but so far performing as expected.
Would recommend: Yes
0 of 2 found the following review helpful.
Was it helpful to you? Yes | No

Mostly Good

by gmac, Verified Owner from NV, United States Written on December 13, 2025
Nice optic. Eye relief is a bit tricky and will take some getting used to.
Would recommend: Yes
Was it helpful to you? Yes | No

Fantastic optic

by John, Verified Owner from IL, United States Written on December 8, 2025
Honestly a great optic.

Eye relief is fine. Shot some 2 gun courses with this mounted on an AK. The eye relief is perfectly functional if you mount the sight well. The magnification is high enough to help at range and low enough to be comfortable up close.

Illumination is incredibly bright. The brightest reticle illumination I have ever seen. Everyone i show this thing to is blown away by how bright the reticle illumination is. Like I cannot emphasize how bright this thing is on the max setting. On a clear summer day at noon in direct sun on a flat range this thing still stands out clear and red when illuminated. I am also red/green colorblind so I have trouble seeing red sometimes. This thing STILL stands out.

Light weight

Small profile.

Multiple mount options included in packaging.

Very clear glass. Little to no noticeable distortion

If you want a small, light, quick fixed power scope with good illumination, this will do the job. I cannot see any downsides at this price point. This little scope is great.
Pros:
  • light
  • Small
  • great illuminated reticle
  • clear & bright image
Cons:
  • None
Best Used for:
  • defense
  • competative shooting
  • general / duty
Would recommend: Yes
Was it helpful to you? Yes | No
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