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Primary Arms SLx 3x MicroPrism Red Dot Sight
$379.99 $335.99 Save 12%
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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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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

Great Optic

by eldiabloblanco, Verified Owner from GA, United States Written on December 7, 2025
This specific Primary Arms 3X prism sight is a perfect enhancement to the AK rifle I attached it to. I's lightweight (one of my main considerations) and has a clear, sharp optical view with a very useful sight picture. It seems to be of high-quality manufacture. I also appreciate the eye relief, which is actually more generous than what the maker claims. 3X magnification is just about ideal for an AK chambered in 7.62x39. It's low profile and just stupid fast on target at CQB distances and I can get reliable hits out to nearly 300 yards if I pay attention to what I'm doing. I actually enjoy running this AK even more since I installed this optic. I would readily buy another 3X for a 300 BLK firearm and am strongly considering the 1X model for my truck gun.
Highly recommended.
Pros:
  • Clear sight picture, and lightweight.
Cons:
  • N/A
Best Used for:
  • 7.62 AK and 300 BLK AR
Would recommend: Yes
Was it helpful to you? Yes | No

Red dot sight

by Cory, Verified Owner from MI, United States Written on November 11, 2025
Love it. Highly recommended! I had a first time shooter hitting kill shots from 100 yards no problem installed it on a Ar15
Would recommend: Yes
Was it helpful to you? Yes | No

Primary Arms SLx MicroPrism Raptor 5.56

by Angel Marrero, Verified Owner from PR, United States Written on October 23, 2025
Because I have astigmatism, red dot sights were difficult for me. Instead of a dot, I saw a star shape. With this sight, I corrected that problem. The image is very clear and easier to aim than the dot. You can also adjust more precisely with its .25 MOA.
Would recommend: Yes
Was it helpful to you? Yes | No

Works good

by Rc30, Verified Owner from MI, United States Written on September 21, 2025
Sight it in at 50 yards for 124gr 2400 feet. Works as it should. It’s not hard to turn the light bight dial. It’s not easy ether. I was able to hit constant at 200 yards.
Pros:
  • Small & bright
Cons:
  • dial is hard to turn
Best Used for:
  • any shooting
Would recommend: Yes
Was it helpful to you? Yes | No

high quality for the cost

by cb, Verified Owner from TN, United States Written on September 18, 2025
Well built with clear glass!
Nice illumination.
The adjustments are not the most crisp but they do the job fine.
The eye relief isn’t very good because of the 3x coupled with a smaller objective but I did get used to it quickly.
I would recommend purchasing this for anyone looking for a small light weight optic.
Can’t beat it for the price.
Pros:
  • None
Cons:
  • eye relief
Would recommend: Yes
Was it helpful to you? Yes | No

Small but needs improvement

by Jay, Verified Owner from TN, United States Written on September 2, 2025
Good small 3x with many mounting options included. Clarity isn’t as good as their glx series. Has nice reticle design. Intensity knob is stiff to move. Battery cap can become loose if you turn intensity knob counterclockwise. The auto on feature allows it to be left on if necessary so knob won’t have to be moved as often anyway.
Pros:
  • Small ,nice reticle, good warranty
Cons:
  • Intensity knob stiff
Would recommend: Yes
Was it helpful to you? Yes | No

Couldn't be happier

by Anteater, Verified Owner from TX, United States Written on August 21, 2025
Was on the fence about this one for a while and im glad I finally pulled the trigger. Ive got it on an 8.3" 300blk with an sbpdw brace and fully extended the eye relief is spot on as soon as you throw it up. Glass is crystal clear and has tons of illumination levels for any environment. Definitely recommend over an lpvo or dot and magnifier combo for weight savings alone.
Pros:
  • Super clear glass, very good eye relief on AR pistol
Cons:
  • None that I've found
Best Used for:
  • Pistol length 300blk AR
Would recommend: Yes
1 of 1 found the following review helpful.
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Wonderful optic for astigmatism!

by Chris, Verified Owner from GA, United States Written on August 15, 2025
This is my first quality etched/prism optic and it is wonderful. Ive been seeing nothing but starbursts for years now with various red dots and wish I would have bought sooner. 10/10 would buy again
Would recommend: Yes
1 of 1 found the following review helpful.
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Great Optic for the Price

by Marshall, Verified Owner from FL, United States Written on July 30, 2025
I have astigmatism so all red dots are 100% starburst for me and though holographic sights look much better they still aren’t perfectly clear for me. On the other hand this prism sight is 100% crystal clear for my aging eyes with astigmatism. I own Eotech, Holosun, Vortex (all very expressive sights) and this Primary Arms SLX looks the crispest BY FAR at half the price. At 3x the eye relief isn’t bad at all i can shoot 2 eyes open with very little issues the eye box is very forgiving. It comes with various mounts which is awesome for this price point. I purchased a Mini Acog QD mount and this thing is absolutely perfect for me. It gets daytime bright and it also has a etched reticle as well which is an amazing feature for the price. High quality dials that are nice smooth and tactile, the functionality and making adjustments is very simple. I zeroed it and shot 200rds and it held a perfect zero.
Would recommend: Yes
1 of 1 found the following review helpful.
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