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Primary Arms

Primary Arms SLx 3x MicroPrism

Compact 3x prism optic with ACSS Raptor reticle

Quick Specs

Price
$349
Weight
9.6 oz
Brand
Primary Arms
Category
optic

Features

  • Fixed 3x
  • ACSS Raptor reticle
  • Prism design

Capability Boosts

Long Range+2

Compatibility Tags

family: ar-patterninterface: picatinny-topsuitable-for: compact

Overview

The Primary Arms SLx 3x MicroPrism represents a revolutionary approach to magnified optics for AR platforms, combining the compact footprint of a red dot sight with fixed 3x magnification and an etched reticle that remains visible even without battery power. At just 9.6 oz and barely longer than a standard red dot, the MicroPrism delivers a unique value proposition for shooters seeking simplicity, reliability, and extended effective range.

The prism optical design offers a critical advantage for shooters with astigmatism - unlike red dot sights that appear as blurry starbursts to astigmatic eyes, the etched glass reticle of the MicroPrism appears crystal clear regardless of eye condition. The ACSS Raptor 5.56/.300BLK reticle provides automatic ranging using the horseshoe and BDC holdovers calibrated for common AR ammunition, transforming a basic carbine into a capable 500-yard platform.

With its compact size, the 3x MicroPrism excels in roles where a traditional LPVO is too heavy or bulky - patrol carbines, truck guns, and compact defensive rifles. The fixed 3x magnification hits the sweet spot for most defensive and tactical scenarios from room distance to 300+ yards, while the extremely generous eyebox allows for rapid target acquisition comparable to a red dot.

Key Features

  • Ultra-compact prism design - red dot size with 3x magnification
  • Etched ACSS Raptor reticle visible without battery
  • Automatic ranging using horseshoe and BDC holdovers
  • Ideal for shooters with astigmatism - crisp reticle
  • Ultra-wide field of view for rapid target acquisition
  • 11 illumination settings including night vision compatible
  • Extremely forgiving eyebox - nearly unlimited eye relief
  • AA battery provides 1,500+ hours runtime
  • Waterproof, shockproof, and fogproof construction
  • Lightweight at 9.6 oz

Pros

  • +Perfect solution for shooters with astigmatism
  • +Extremely compact and lightweight for magnified optic
  • +Etched reticle works without battery
  • +ACSS reticle simplifies ranging and holdovers
  • +Wide field of view rivals 1x optics
  • +Extremely forgiving eyebox
  • +Excellent value at $349
  • +AA battery is widely available

Cons

  • Fixed 3x magnification - no variable option
  • Limited to ~400 yards effective range
  • Some users find 3x too much for close quarters
  • Prism design creates slight tunnel vision effect
  • Not ideal for precision long-range work

Detailed Specifications

Reticle
ACSS Raptor 5.56/.300BLK (etched, illuminated)
Magnification
3x (fixed)
Objective Diameter
Prism (equivalent to ~20mm)
Eye Relief
2.75 inches (extremely forgiving)
Field of View
37 ft @ 100 yds
Adjustment Type
0.5 MOA per click
Adjustment Range
100 MOA elevation / 100 MOA windage
Battery Type
AA
Length
4.4 inches
Material
7075-T6 aluminum
Waterproof Rating
Yes (IPX7 rated)

Compatible Platforms

+23 more

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