The Primary Arms GLx 1X MicroPrism is the premium step up from the SLx prism line — a bigger 20.5mm window, near-unlimited eye relief and improved daylight-bright illumination. Because the ACSS Cyclops reticle is etched into the glass, it stays usable even with the illumination off, ideal for shooters with astigmatism.
The Cyclops reticle combines a fast horseshoe and precise centre chevron with built-in ranging, while push-button controls drive 13 settings (3 night-vision) and AutoLive saves battery. It ships with a modular mount offering 8 height options.
How It Compares
Prefer green? See the GLx 1X MicroPrism green. Want a smaller, lighter prism? The SLx 1X MicroPrism. Browse all prism scopes and AR-15 optics; read our ACSS explainer.
Ideal For
- Close-range AR/carbine and AK setups
- Low-comb stocks (near-unlimited eye relief)
- Shooters with astigmatism (etched reticle)
- Premium red-dot-alternative builds
Key Features
- 1x prism; etched red ACSS Cyclops reticle with ranging
- Larger 20.5mm window; near-unlimited eye relief
- 13 settings (3 NV); AutoLive; push-button controls
- 1/2 MOA clicks; 50 MOA travel; 8 mount heights
- Mini-ACOG / MicroPrism footprint; IP67, nitrogen-purged
Technical Specifications
| Magnification |
1x |
| Objective |
20.5 mm |
| Reticle |
ACSS Cyclops (etched, red) |
| Brightness |
13 settings (3 NV) |
| Click Value |
1/2 MOA |
| Adjustment Range |
50 MOA W&E |
| FOV @ 100 yd |
74.8 ft |
| Battery |
CR2032 (~14,925 h at setting 5) |
| Mount |
Mini-ACOG / MicroPrism footprint, 8 heights |
| Length / Weight |
2.6 in / 9.1 oz |
| Sealing |
IP67, nitrogen-purged |
What's Included
- Primary Arms GLx 1X MicroPrism scope
- CR2032 battery, ruggedised mount (8 heights)
UK Delivery & Support
UK-stocked and dispatched tracked from our UK warehouse — no import duties or customs delays — backed by UK-based support and the Primary Arms Lifetime Warranty.
Frequently Asked Questions
SLx or GLx MicroPrism?
The GLx adds a larger window, near-unlimited eye relief, push-button controls and improved illumination.
Why a prism over a red dot?
The etched reticle stays sharp even without illumination — ideal for astigmatism.
How does it mount?
On the mini-ACOG / MicroPrism footprint, with 8 included height options.
