Description
The Primary Arms SLx 5x MicroPrism takes the compact prism concept and stretches it out to mid-range. It delivers 5x magnification in an ultra-compact, lightweight prism body, giving you real reach on a rifle without the size and weight of a traditional scope or LPVO. It's built for the shooter who wants to identify and engage targets further out than a 3x can comfortably reach, while keeping a rugged, simple, fixed-power optic.
Like all prism scopes, it has two advantages over a red dot. The reticle is etched into the glass, so it's fully usable whether the illumination is on or off, kill the battery and you still have a black reticle. And it works for shooters with astigmatism: where a red dot's LED can look like a smeared starburst, the etched reticle stays crisp and clean. If red dots have never worked for your eyes, a prism solves it.
The difference between this and the 3x is the reticle philosophy. This 5x uses the ACSS Aurora MIL reticle, a precision-oriented design built around a MIL-based grid. Instead of a caliber-specific auto-ranging BDC, the Aurora gives you mil holds for elevation and wind that work with any cartridge once you know your dope, which is what a more deliberate, precision-minded shooter wants for mid-range work. It's the reticle for holding and dialing in mils rather than point-and-shoot holdovers.
It runs 13 illumination settings with AutoLive motion-sensing, so the reticle lights up the instant you move the rifle and sleeps when it sits still, preserving battery. It's night-vision compatible, ships with a mount, and we carry it in black and FDE. Browse the rest of our optics and scopes here.
5x MicroPrism or 3x MicroPrism?
We carry both. This 5x is the longer-reaching, more precision-focused option, better for mid-range identification and engagement, with the ACSS Aurora MIL reticle for holding in mils. The 3x MicroPrism is faster and better for close-to-medium range, with the caliber-calibrated ACSS Raptor auto-ranging BDC reticle built for a fighting rifle. Get the 5x for reach and precision; get the 3x for speed and do-it-for-you holdovers.
Prism vs Red Dot + Magnifier
Choosing between a 5x prism and a red dot with a magnifier? The prism is a single sealed unit, lighter and simpler, with a detailed etched reticle and astigmatism compatibility. A red dot plus a magnifier like the Holosun HM6X lets you flip the magnifier aside for a true 1x, which the fixed 5x can't do. If you need a genuine 1x for close range, go red dot plus magnifier. If you want a lighter, simpler, precision-reticle optic that handles astigmatism, the prism is the better tool.
Key Features
- 5x magnification, compact prism. Mid-range reach in a small, light body.
- Etched ACSS Aurora MIL reticle. Works illuminated or not; MIL-based precision holds.
- Astigmatism friendly. Etched reticle stays crisp where a red dot smears.
- Mil holds for any cartridge. Elevation and wind in mils once you know your dope.
- AutoLive motion sensing. 13 brightness settings, illumination wakes on movement.
- Mount included. Night vision compatible. Black or FDE.
Specs
- Type: Fixed 5x prism scope
- Reticle: Red illuminated ACSS Aurora MIL, etched
- Magnification: 5x
- Illumination: 13 settings with AutoLive motion sensing
- Night vision: Compatible
- Mount: Included
- Colors: Black or FDE
FAQ
Will this work if I have astigmatism?
Yes. Like all prisms, it uses an etched glass reticle rather than a projected LED dot, so it stays crisp for shooters with astigmatism who see red dots as a smear. It's one of the main reasons to choose a prism.
What is the ACSS Aurora MIL reticle?
It's a precision-oriented reticle built around a MIL grid. Rather than a caliber-specific BDC, it gives you mil-based elevation and wind holds that work with any cartridge once you know your dope. It's designed for deliberate mid-range shooting where you hold or dial in mils.
Does the reticle work if the battery dies?
Yes. The reticle is etched into the prism and remains fully usable as a black reticle with the illumination off. The battery only powers the red illumination.
Should I get the 5x or the 3x?
Get the 5x for more reach and precision-style holds in mils at mid-range. Get the 3x for faster, closer shooting with a caliber-calibrated auto-ranging BDC. The 5x is the precision choice; the 3x is the speed choice.
How's the battery life?
Long, thanks to AutoLive motion sensing, which sleeps the illumination when the optic is still and wakes it when you move the rifle. And even with the battery dead, the etched reticle stays usable.
