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Questions & Answers
is there a means to mount this atop my PA 3x ACSS 5.56 combat optic?

Yes. Get the Mini Reflex 12 o'clock mount. Part number 910091. They also call it MR12 Offset Mount. It has a Glock MOS mount so you'll need a RR Adapter. Good Luck.

by mark, Verified Owner, February 7, 2025
Will it fit a Glock 43x

no. the 43x has an RMSc footprint and this red dot has an RMR footprint, or as the description says, a "507c" footprint (which is RMR).

by Ronald Spurbeck, Verified Owner, July 24, 2025
Customer Reviews
Helpful Positive Review
For the price, it would be hard to beat this dot. Does everything it's supposed to and quality looks to be top notch.
1/1 found this helpful
Helpful Positive Review
Has Shake-Awake by Jonny, Verified Owner, December 1, 2024
I've only had good experiences with Primary Arms optics. The dot is just the right size for home defense or plinking, gets really bright, and is relatively crisp even with slight astigmatism. The fact that it has shake-awake made me choose this over ...
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1/1 found this helpful
Most Recent Reviews
compact and working well by Henri, Verified Owner, December 20, 2025
Purchased that one for its simple and rugged construction. It is a simple but yet feature relevant red dot. Mounted on a plate that uses the rear sight beaver mount on a VP9, it seats low and stays compact.
Read All 3 Reviews
Color: Black Reticle: 3 MOA Dot Illumination Color: Red Red Dot Sights-Footprint: RMR

Code: 29R-RD-PA24M-810043

MPN: 810043

UPC: 818500019817

List: $172.99Save 13%
$149.99

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Product Info for Primary Arms Classic Series 24mm Mini Reflex Sight with Autolive, 3 MOA Red Dot

The Primary Arms MRS Mini Reflex Sight is a continuation of the new line of red dot sights designed specifically for mounting to pistol slides. The Mini Reflex Sight is optimized for full size carry pistols or competition guns as it features a large 24x17mm lens allowing for a quick and easy sight picture all while weighing under an ounce. It utilizes the popular 507c 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 carry, competition, or even your rifle, you can't go wrong with the Primary Arms MRS.image

Specifications for Primary Arms Classic Series 24mm Mini Reflex Sight with Autolive, 3 MOA Red Dot:

Manufacturer: Primary Arms
Color: Black
Fabric/Material: 6061 Aluminum
Magnification: 1 x
Objective Lens Diameter: 24 mm
Objective Window Size: 24 mm
Reticle: 3 MOA Dot
Illumination Type: LED
Illumination Color: Red
Brightness Settings: 10
Battery Type: CR2032
Battery Life: 40000 hours
Weight: 0.98 oz
Red Dot Sights-Footprint: RMR

Package Contents:

  • Primary Arms Classic Series 24mm Mini Reflex Sight with Autolive, 3 MOA Red Dot

Primary Arms Classic Series 24mm Mini Reflex Sight with Autolive, 3 MOA Red Dot Orderable Models

List of Orderable Models

  • Primary Arms Classic Series 24mm Mini Reflex Sight with Autolive, 3 MOA Red Dot, Black, 810043 , MPN: 810043 , UPC: 818500019817 , Code: 29R-RD-PA24M-810043
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