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Customer Reviews
Helpful Positive Review
Great Value by Dan, Verified Owner, October 15, 2024
I purchased this to use on my moms Equalizer and so far, it has performed well with 100+ rounds through it at the range. The glass is clear and the dot is bright enough for her to see and shoot well. My only complaint is the need for a tiny allen key...
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3/6 found this helpful
Helpful Negative Review
Primary Arms red dot by Matt, Verified Owner, January 8, 2025
Sight wouldn't adjust elevation at all, sight would turn on and off just racking the slide. Looked like it had been opened previously to my delivery. Guessing it was a return already.
4/6 found this helpful
Most Recent Reviews
solid red dot by Andrew Wheeler, November 14, 2025
Looks awesome on my 43x and holds zero very well. Turret adjustments are a pain in the butt since it uses a particularly small Allen wrench. Only issue I've had with it is the seemingly random deactivation and lack of shake awake capability.
Most Recent Reviews
DOT was DOA by Ed, Verified Owner, April 16, 2025
Red dot was faulty upon arrival. Took out of box and removed protective back plate, turned on per instructions and dot was visible in window. Once mounted to the pistol slide the dot was gone and could not turn back on. Removed from slide and dot was...
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2/2 found this helpful
Read All 4 Reviews
Color:
Black
Reticle:
2 MOA Dot
Illumination Color:
Red
Red Dot Sights-Footprint:
RMSc

Code: 29R-RD-PA21M-810044

MPN: 810044

UPC: 818500019824

List: $172.99Save 13%
$149.99

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OP Bucks$4.10

Product Info for Primary Arms Classic Series 21mm Micro Reflex Sight with Autolive, 3 MOA Red Dot

The Primary Arms MRSC Micro Reflex Sight is a continuation of the new line of red dot sights designed specifically for mounting to pistol slides. The Micro Reflex Sight is optimized for compact and micro compact pistols for concealed carry as it features a slightly smaller 21mm lens to keep the profile as slim as possible when mounting on smaller pistols eliminating any overhang on the slide. Even though the lens is smaller than the mini, the square profile offers an unobstructed field of view allowing you to have a clear sight picture every time you present your pistol. It utilizes the RMSc footprint for a wide range of compatibility with milled slides and adapter plates and houses a bottom mounted CR2032 battery offering up to 40k hours of battery life on the medium setting. With 10 total illumination settings, and a daylight bright 3 MOA red dot, this reflex sight is sure to be quick to pick up and easy to use. The lens is fully multicoated for scratch and fog resistance and the 6061 Aluminum housing is extremely durable. If, you are looking for a new red dot for concealed carry you can't go wrong with the Primary Arms MRSC.image

Specifications for Primary Arms Classic Series 21mm Micro Reflex Sight with Autolive, 3 MOA Red Dot:

Manufacturer: Primary Arms
Color: Black
Fabric/Material: 6061 Aluminum
Magnification: 1 x
Objective Lens Diameter: 21 mm
Objective Window Size: 21 mm
Reticle: 2 MOA Dot
Illumination Type: LED
Illumination Color: Red
Brightness Settings: 10
Battery Type: CR2032
Battery Life: 40000 hours
Weight: 0.56 oz
Red Dot Sights-Footprint: RMSc

Package Contents:

  • Primary Arms Classic Series 21mm Micro Reflex Sight with Autolive, 3 MOA Red Dot

Primary Arms Classic Series 21mm Micro Reflex Sight with Autolive, 3 MOA Red Dot Orderable Models

List of Orderable Models

  • Primary Arms Classic Series 21mm Micro Reflex Sight with Autolive, 3 MOA Red Dot, Black, 810044 , MPN: 810044 , UPC: 818500019824 , Code: 29R-RD-PA21M-810044
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