Primary Arms SLX 3X MicroPrism Scope
- Magnification Minimum: 3x
- Magnification Maximum: 3x
- Mounting Type: Picatinny Mount
- Night vision: No
Last refreshed Jun 22, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A well-regarded compact prism sight where the optic quality outpaces its mounting hardware, worth it for shooters who want illumination that survives a dead battery.
As an Amazon Associate I earn from qualifying purchases. ProductDome earns a commission when you buy through links on this page.
ASIN: B0B4PTWPCJModel: SLX 3X MicroPrismCategory: Rifle Scopes
More from this brandAll Primary Arms rifle scopesColors Available
Styles Available
Need a different one? Pick on Amazon →
Overview
The Primary Arms SLX 3x MicroPrism is a compact, illuminated prism scope built around the ACSS Raptor 5.56/.308 reticle, with auto-ranging holdovers etched into the glass so it still works if the illumination fails.
Because the reticle is etched rather than projected, it stays usable even without battery power, the main reason buyers pick a prism sight over a red dot. The main weakness reported isn't the optic itself but the mounting hardware, which several owners describe as less rugged than the glass.
- ACSS Raptor 5.56/.308 auto-ranging reticle
- 13 brightness settings, red LED illumination
- Under 8 oz and 2.95 inches long
- Backed by Primary Arms lifetime warranty
Who it's for
Good for AR-pattern rifle or pistol owners who want daylight-bright illumination with a fallback etched reticle, including shooters who find red dots blurry due to astigmatism. Less suited to anyone planning true long-range precision work, since 3x and a compact chevron reticle are built for closer engagement distances.
Pros and cons
- Etched reticle stays usable if the battery dies
- Daylight-bright illumination confirmed by multiple owners
- Lighter and more compact than a typical red dot setup
- Mounting hardware described as less rugged than the optic itself
- Illumination brightness uneven across the reticle at low settings for some units
- Chevron center is small, better suited to closer or fixed-position ranging
Performance notes
The ACSS Raptor reticle bakes in auto-ranging holdovers for 5.56 and .308 in 100-yard increments plus crosswind holds, so a shooter reads range and windage off the glass instead of dialing turrets.
Specifications
| Brand | Primary Arms |
|---|---|
| Model | SLX 3X MicroPrism |
| Construction & materials | |
| Material Type | Aluminum |
| Color | Black |
| Compatibility & installation | |
| Mounting Type | Picatinny Mount |
| Compatible Devices | Rifle |
| Warranty & support | |
| Warranty Description | Limited lifetime |
| Other details | |
| Magnification Minimum | 3x |
| Magnification Maximum | 3x |
| Night vision | No |
| Sport Type | Shooting |
Frequently asked questions
Does the Primary Arms SLX 3x MicroPrism work without a battery?
Yes, the ACSS Raptor reticle is etched into the glass and stays visible without illumination.