Primary Arms GLx RS-15 Mini Reflex Sight - ACSS® Vulcan® Dot Reticle

Manufactured by Primary Arms
MPN: 810038
Manufactured by Primary Arms
3 Reviews

In Stock

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This mini reflex sight is part of the mid-tier optics line called GLx. GLx brings premium technology and materials into an approachable price range.

Bringing the quality of the GLx optics to mini reflex sights, the RS-15 is the next generation of pistol optic packed full of features. This mini reflex sight features a larger window, 7075 aluminum construction, and fits the popular C-More footprint for out of the box compatibility with a large variety of pistol slides and adapter plates. Side mounted brightness buttons make it easy to use and the top mounted battery compartment allows you to quickly change batteries without having to remove your optic. This model comes with a Red Dot Bright® ACSS® Vulcan® Dot reticle which features a precise dot with an outer circle that extends outside of the visible lens. This outer circle provides a quick reference to where your dot is allowing you to quickly adjust and get your reticle on target.

New for this line of mini reflex sights is the .5 MOA windage and elevation adjustments for even finer control over your zero making this optic great for competition use where pinpoint accuracy is crucial. Improved lens coatings offer exceptional clarity and the wider lens makes quick target transitions easy. Autolive® functionality further improves the already impressive battery life by automatically shutting the reticle off when set down and turns on the instant motion is detected ensuring your red dot is always ready when you need it. The waterproof and shockproof construction ensures reliable functionality rain or shine and it also comes with the Primary Arms comprehensive lifetime warranty.


  • 7075 Aluminum construction
  • Hardcoat anodized black
  • Top loading CR2032 battery compartment
  • 5,000 Hour battery life with full reticle on medium setting
  • 25,000+ Hour Battery life with dot reticle on medium setting
  • Side mounted buttons for brightness (13 settings with 3 night vision)
  • Red Dot Bright® ACSS Vulcan Dot reticle (3 MOA center dot with 250 MOA outer circle)
  • Multi-reticle select can be changed between circle/dot and just the dot
  • .5 MOA windage and elevation adjustments
  • Autolive® functionality
  • Waterproof and shockproof construction
  • Multicoated lens
  • C-More footprint
  • Includes GLOCK MOS compatible mounting plate
  • Length: 1.84"
  • Weight: 1.11 oz.
  • Aperture diameter: 26x20mm
  • Lifetime warranty
See More


Battery Life1,001 - 5,000 Hours
Battery TypeCR2032 3V Lithium Coin
BrandPrimary Arms
Brightness13 Settings
Click Value.5 MOA
FinishHardcoat Anodized
ManufacturerPrimary Arms
MaterialAluminum - 7075
Mount CompatibilityC-More
Night Vision CompatibleNight Vision Compatible
Optic SeriesGLx
Reticle ColorRed
Weight1.11 oz.
  • GLx RS-15 Product Overview
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

Ratings & Reviews

3 reviews

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Great optic wrong footprint


I waited a year for this dot to be released. The entire time we were waiting, the footprint listed was supposed to be DDP. Just before releasing the actual product, it was changed to the C-More footprint. If you have a gun with a plate system then you could make it work with the Vortex Razor plate. If you have a slide cut for RMR then there are no adapter plates available. I have RMR adapter to all the other popular footprints but none for C-More.

Please make an adapter plate to convert popular footprints to the C-More.

Superb RDO with direct fitment on Sig Pro-Cut slide


This optic is my third with the ACSS Vulcan reticle, but first PA-branded open reflex (others are HS 507k & 507c). I've become a real believer in this reticle, in either red or green.

Target and sight acquisition are super-fast and consistent -- intuitive, too, once a little muscle memory is achieved. For me, it also had a minimal learning curve, with the added benefit of presentation depth feedback, making it simple to verify the gun is in the correct position for each round fired.

Too far away, the 250 MOA outer ring disappears. In too close, the outer ring circles the 3 MOA dot. At just right, the outer ring guides the dot to perfect target alignment. It's a system beneficial to both experienced shooters and new RDO users, and it just plain works.

This optic, like the HS RDOs, checks all the right feature boxes too, including shake awake, top-mount battery and side-mount brightness.

It’s a real winner. A+ performance and value.

ACSS Vulcan is Awesome


I have several ACSS Reticles for my optics, from scopes to red dots.
I love every single one of them.
I was hoping for the ACSS Vulcan with the dot instead of the chevron to come for my pistols, however, I can't use it since the footprint C-More is not what I have and there is no adapter plate to put on my guns that have RMR cuts... I hope you make one for the RMR or make an adapter plate for it...