The Primary Arms GLx RS-15R is a mini reflex red dot sight that takes everything shooters love about the RS-15 — the huge 26x20mm window and the patented ACSS Vulcan reticle — and rebuilds it on the universal RMR/Holosun 507C footprint, so it drops onto far more optics-ready slides and mounts. A Glock MOS adapter plate ships in the box.
The Vulcan reticle shows a crisp 3 MOA dot when you're on target; drift off and the 250 MOA outer circle appears at the window's edge, steering your eye back to centre. The top-loading CR2032 swaps without unmounting (no re-zero), AutoLive motion sensing manages runtime, and 13 brightness settings include 3 for night vision — all in an anodised black 7075 aluminium housing with fully potted electronics.
How It Compares
Competition gun with a C-More/DPP cut? The original GLx RS-15. Simpler and cheaper on the same footprint? The SLx RS-10R. Enclosed emitter? The PLx HTX-1. New to Vulcan? Read our ACSS guide; browse RMR-footprint red dots and all pistol dot sights.
Key Features
- ACSS Vulcan — 3 MOA dot + 250 MOA correction ring
- Large 26x20mm aperture; 13 settings incl. 3 NV
- RMR/507C footprint; Glock MOS adapter plate included
- Top-load CR2032 — no re-zero on battery swaps; AutoLive
- 7075 aluminium, anodised black, potted electronics; lifetime warranty
Technical Specifications
| Reticle |
ACSS Vulcan (3 MOA dot / 250 MOA ring) |
| Window |
26 x 20mm |
| Battery |
CR2032 top-load; AutoLive motion sensing |
| Footprint |
RMR / Holosun 507C; Glock MOS plate included |
| Adjustment |
0.5 MOA per click; 87 MOA total W&E |
| Housing |
7075 aluminium, anodised black |
| SKU / MPN / UPC |
PA-GLX-RS-15R-ACSS / 610193 / 810178480203 |
What's Included
- GLx RS-15R sight, Glock MOS adapter plate, CR2032, tools, manual
UK Delivery & Support
UK-stocked and dispatched tracked from our UK warehouse — no import duties or customs delays — backed by UK-based support and Primary Arms' lifetime warranty.
Frequently Asked Questions
RS-15 or RS-15R?
Same window, reticle and controls — the R moves from the competition C-More footprint to the far more common RMR/507C pattern, making it the pick for most optics-ready pistols.
How does the Vulcan ring work?
On target you see only the 3 MOA dot; when your presentation drifts, the 250 MOA ring appears and shows exactly which way to correct — it makes bad draws obvious in dry fire.
Will it fit my Glock MOS?
Yes — the included adapter plate mounts it to MOS-cut 9mm slides. See our Glock MOS fitting guide.
