Primary ArmsPrism Scope
Primary Arms SLx 1X MicroPrismT Scope Green Illuminated ACSS Gemini 9mm Reticle H1/T1 Footprint
- Magnification
- 1x unmagnified prism
- Reticle
- ACSS Gemini 9mm, etched into the glass, calibrated for 9mm from...
- Holdovers
- Bullet drop references out to 200 yards, plus ranging and moving-target...
- Aiming point
- Precise centre chevron inside a bold outer horseshoe for fast close-range...
In stock — 7–10 business day delivery
Tracked delivery, estimated 7–10 working days
Want to know when it's back? Email us and we'll let you know
Multi-buy savings
Mix any optics and lights — applied automatically
- 5%2 items
- 10%3 items
- 15%4 or more
Applied automatically at checkout — no code needed. Accessories such as tailcaps, switches and mounts aren't included.
Complete your setup
- Shipped from the UK with tracked delivery
- 30-day returns on unused items
- Warranty support — contact us first
Delivery
Every order is shipped from the UK with tracked delivery. Estimated delivery time is 7–10 working days, and you will receive tracking details by email as soon as your order is on its way.
Returns
Unused items in their original packaging can be returned within 30 days. Email info@opticstrader.co.uk first and we will confirm the return details.
Warranty
Every product is new and boxed. If anything goes wrong, contact us first and we'll help with a manufacturer warranty claim where one applies.
The Primary Arms SLx 1X MicroPrismT Scope with the green ACSS Gemini 9mm reticle (part number 710084, SKU PA-SLX-1XMP-H-9MM-G) is a 1x unmagnified prism scope with a glass-etched ACSS Gemini 9mm reticle illuminated in green, built on the H1/T1 micro-dot footprint and supplied with a 2.26 in mount. It is 2.48 in (63 mm) long, weighs 5.5 oz (156 g), adjusts in 1 MOA clicks with 120 MOA of total travel, gives a 76.5 ft field of view at 100 yards (25.5 m at 100 m), and is sealed to IP67.
The ACSS Gemini 9mm is calibrated specifically for 9mm from barrels of 7.5 to 16 inches (191 to 406 mm), with bullet drop references out to 200 yards, ranging, moving-target leads and a bold outer horseshoe around a precise centre chevron. Nine millimetre drops far more sharply than a rifle cartridge, so a 5.56 holdover ladder would simply be wrong on a pistol-calibre carbine — this reticle exists to fix that.
Green illumination is the difference here. Human vision peaks in the green part of the spectrum, so the reticle usually registers faster and stays clear at a lower brightness setting. And because it is a prism, the reticle is etched into the glass rather than projected, so shooters with astigmatism see it sharply instead of as a smear, and it stays usable with the illumination off.
How it compares
This is the 9mm-specific green version. The same optic is offered with the red ACSS Gemini 9mm reticle. For a general-purpose reticle instead, see the SLx 1X MicroPrismT with the green ACSS Cyclops Gen II reticle or the simpler T-Dot reticle version. For a rifle-calibre ballistic reticle with magnification, the SLx 3X MicroPrism with green ACSS Raptor illumination covers 5.56 and .308. Browse the Primary Arms prism scope range and all prism scopes, and read our guides to how prism scopes work and green versus red illumination.
Ideal for
- 9mm pistol-calibre carbines with barrels between 7.5 and 16 inches
- Shooters with astigmatism who see red dots as a smear, flare or double image
- Airsoft replicas and training carbines using the widely available H1 and T1 mounts
- Low-light and dusk shooting, where the green reticle is clear at a lower setting
Key features
- Magnification: 1x unmagnified prism
- Reticle: ACSS Gemini 9mm, etched into the glass, calibrated for 9mm from 7.5 to 16 in (191–406 mm) barrels
- Holdovers: Bullet drop references out to 200 yards, plus ranging and moving-target leads
- Aiming point: Precise centre chevron inside a bold outer horseshoe for fast close-range pickup
- Illumination: Green, 13 settings of which 3 are night-vision compatible, with AutoLive motion sensing
- Astigmatism: The etched reticle is resolved through the optic's own focusing system, so it stays sharp for eyes that see LED red dots as a smear
- Footprint: H1/T1 micro-dot pattern, with a 2.26 in mount included
- Turrets: 1 MOA per click, 120 MOA of total travel
- Sealing: IP67 rated and nitrogen-purged against fogging
| Product Type | MicroPrism scope, unmagnified |
| Magnification | 1x, prism |
| Reticle | ACSS Gemini 9mm, glass-etched, green illuminated |
| Calibration | 9mm, barrels of 7.5–16 in (191–406 mm), bullet drop to 200 yards |
| Illumination | 13 brightness settings, 3 night-vision compatible, with AutoLive |
| Click Value | 1 MOA per click |
| Adjustment Range | 120 MOA total |
| Field of View | 76.5 ft at 100 yards (25.5 m at 100 m) |
| Length / Weight | 2.48 in (63 mm) / 5.5 oz (156 g) |
| Water Resistance | IP67, nitrogen-purged |
| Mount | H1/T1 micro-dot footprint, 2.26 in mount included |
| SKU / MPN / UPC | PA-SLX-1XMP-H-9MM-G / 710084 / 810178480364 |
Which calibre is the ACSS Gemini reticle calibrated for?
The ACSS Gemini reticle in this optic is calibrated for 9mm, specifically for barrels between 7.5 and 16 inches, with bullet drop references extending to 200 yards.
What does the ACSS Gemini 9mm reticle actually do?
The ACSS Gemini 9mm places a precise centre chevron inside a bold outer horseshoe for fast pickup at close range, and adds bullet drop references to 200 yards, ranging features for estimating distance, and moving-target leads.
Why choose green illumination over red?
The human eye is most sensitive to green light, so a green reticle is often easier to pick up against foliage and in poor light, and it can be seen clearly at a lower brightness setting, which saves battery.
Does a prism scope help with astigmatism?
Yes, for many shooters it does. A prism scope's reticle is etched into the glass and viewed through the optic's own focusing system, so it is resolved by the same corrected optical path as the target, whereas a red dot projects an LED that an astigmatic eye commonly sees as a smear, flare or double image.
Can I use this optic on a 5.56 rifle?
You can fit it, but the holdover marks would be wrong, because the ACSS Gemini reticle is calibrated for the much steeper trajectory of 9mm. For 5.56 and .308, choose an optic with the ACSS Raptor reticle instead.
Does the reticle work if the battery dies?
Yes. The ACSS Gemini 9mm reticle is etched into the glass rather than projected, so it remains fully visible and usable with the illumination switched off or the battery flat.
Every order is shipped from the UK with tracked delivery, with an estimated delivery time of 7–10 working days. Unused items in their original packaging can be returned within 30 days for a full refund.