The Primary Arms SLx 3X MicroPrism Scope with green illumination (part number 710037, SKU PA-SLX-3XMP-RAPTOR-5YP-G) is a fixed 3x magnification prism scope with a glass-etched ACSS Raptor 5.56/.308 Yard reticle illuminated in green. It is 2.95 in (75 mm) long, weighs under 8 oz (227 g), adjusts in 1/4 MOA clicks with 80 MOA of windage and elevation travel, gives a 38 ft field of view at 100 yards (12.7 m at 100 m), and runs up to around 29,000 hours on a CR2032 cell across 13 brightness settings, three of them night-vision compatible.
Two things make this variant worth choosing. First, it is a prism scope: the reticle is etched into the glass rather than projected as an LED, so an eye with astigmatism resolves it sharply instead of seeing the smear or starburst that red dots produce for many people. Second, the emitter is green, and because human vision peaks in the green part of the spectrum, that centre often registers faster against foliage and in the flat overcast light that covers most of the British shooting year.
How It Compares
This is the green-illuminated black 3X. The same optic is offered with red ACSS Raptor illumination and in Flat Dark Earth with red illumination. For more magnification and a milliradian grid, see the SLx 5X MicroPrism with the ACSS Aurora MIL reticle; for an unmagnified prism, the GLx 1X MicroPrism with green ACSS Cyclops illumination. Browse the Primary Arms prism scope range and all prism scopes, and read our guides to how prism scopes work, astigmatism and red dot sights and green versus red illumination.
Ideal For
- Shooters with astigmatism who see red dots as a smear, flare or double image
- Deer stalking and woodland shooting, where a green centre stands out against foliage
- Civilian Service Rifle and practical rifle in 5.56 or .308 under British overcast
- Night fox and vermin control at dusk, where a lower brightness setting is enough
Key Features
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Magnification: Fixed 3x — real magnification in a body under 3 inches long
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Reticle: ACSS Raptor 5.56/.308 Yard, etched into the glass, with bullet drop holdovers, ranging, wind holds and a precise centre chevron, calibrated for 5.56 and .308 in yards
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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
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Illumination: Green, 13 settings of which 3 are night-vision compatible, with AutoLive motion sensing, up to around 29,000 hours on one CR2032 cell
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Backup: Fully usable with illumination off or the battery flat
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Field of view: 38 ft at 100 yards (12.7 m at 100 m)
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Turrets: 1/4 MOA per click, 80 MOA of windage and elevation travel
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Mount: Ruggedised mounting system with 8 height options, on the mini-prism footprint
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Warranty: Primary Arms Lifetime Warranty
Technical Specifications
| Product Type |
MicroPrism scope, fixed magnification |
| Magnification |
3x fixed |
| Reticle |
ACSS Raptor 5.56/.308 Yard, glass-etched, green illuminated |
| Illumination |
13 brightness settings, 3 night-vision compatible, with AutoLive |
| Battery |
CR2032, up to approximately 29,000 hours |
| Click Value |
1/4 MOA per click |
| Adjustment Range |
80 MOA windage and elevation |
| Field of View |
38 ft at 100 yards (12.7 m at 100 m) |
| Eye Relief |
2.7 in (69 mm) |
| Length / Weight |
2.95 in (75 mm) / under 8 oz (227 g) |
| Mount |
Mini-prism footprint, 8 height options included |
| Warranty |
Primary Arms Lifetime Warranty |
| SKU / MPN / UPC |
PA-SLX-3XMP-RAPTOR-5YP-G / 710037 / — |
What's Included
- Primary Arms SLx 3X MicroPrism scope
- CR2032 battery, lens covers, ruggedised mount with 8 heights and manual
Warranty
Covered by the Primary Arms Lifetime Warranty.
UK Delivery & Support
This prism scope is UK-stocked and dispatched tracked from our UK warehouse — no import duties and no customs delays — backed by UK-based aftersales support and the Primary Arms Lifetime Warranty.
Frequently Asked Questions
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.
Which calibre is the ACSS Raptor 5.56/.308 Yard reticle calibrated for?
The ACSS Raptor 5.56/.308 Yard reticle is calibrated for both 5.56 and .308, and its ranging and holdover marks are laid out in yards.
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 the Primary Arms SLx 3X MicroPrism work if the battery dies?
Yes. The 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.
What mount does the SLx 3X MicroPrism need?
The SLx 3X MicroPrism ships with its own ruggedised mounting system offering 8 height options on the mini-prism footprint, so no separate mount needs to be bought.
What does AutoLive do on this optic?
AutoLive is Primary Arms' motion-sensing system, which switches the illumination off when the rifle has been still for a period and restores it the instant the rifle moves, preserving battery life without the shooter having to remember to switch the optic off.
