The Primary Arms SLx 1X MicroPrism with the green ACSS Gemini 9mm reticle is a compact prism optic built for 9mm pistol-calibre carbines — red-dot speed with the clarity and durability of an etched glass reticle that stays sharp even for shooters with astigmatism, here with high-visibility green illumination. It uses the H1/T1 micro-dot footprint.
The ACSS Gemini 9mm reticle is calibrated for 7.5–16in 9mm barrels, with a centre chevron, bullet-drop references to 200 yards, ranging and a bold outer horseshoe for fast close-range pickup and moving-target leads. Green illumination across 13 settings (3 NV), AutoLive motion activation, and an IP67 nitrogen-purged body. Ships with the 2.26in mount.
How It Compares
Prefer red illumination? See the red Gemini 9mm version. Browse all prism scopes and the Primary Arms range; learn the reticle in our ACSS guide.
Ideal For
- 9mm PCC and pistol-calibre carbines
- PCC competition and home-defence carbines
- Astigmatism-friendly aiming; H1/T1 builds
Key Features
- 1X prism; green ACSS Gemini 9mm etched reticle
- Calibrated for 7.5–16in 9mm; BDC to 200 yd
- Centre chevron + outer horseshoe; moving-target leads
- H1/T1 footprint; 13 settings (3 NV); AutoLive
- IP67, nitrogen-purged; ships with 2.26in mount
Technical Specifications
| Magnification |
1x (prism) |
| Reticle |
Green ACSS Gemini 9mm (etched) |
| Footprint |
H1/T1 micro-dot |
| Illumination |
13 settings (3 NV), AutoLive |
| Adjustment |
1 MOA/click, 120 MOA total |
| FOV / Length / Weight |
76.5 ft @100yd / 2.48 in / 5.5 oz; IP67 |
What's Included
- Primary Arms SLx 1X MicroPrism (green ACSS Gemini 9mm)
- 2.26in mount, battery, 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 the Primary Arms Lifetime Warranty.
Frequently Asked Questions
Why a prism over a red dot?
The etched reticle is visible with illumination off and stays crisp for shooters with astigmatism.
Green or red?
This is the green version; a red-illuminated version is also available.
What's the ACSS Gemini 9mm reticle?
A 9mm-calibrated reticle with a chevron, holdovers to 200 yards and an outer horseshoe.
