Primary Arms

Primary Arms SLx 5X MicroPrism™ Scope

1 review
5 in stock
Reticle Option: Red Illuminated ACSS Aurora MIL Reticle

This Primary Arms MicroPrism is part of the SLx optics line. SLx optics built their reputation for innovation, reliability, and value. All SLx optics undergo rigorous field-testing during development to best serve you in any environment. 

For precision without compromise, the SLx 5x MicroPrism brings an extended range to this lightweight, ultra-compact design. Weighing only 8.5oz with a 3.31" overall length, the SLx 5x MicroPrism is comparable to many red dot sights, though its crystal-clear glass and 5x magnification offer improved precision at even longer distance than the 3x variant. Even in close-quarters, the optic’s wide field-of-view and forgiving eye relief make it easy to snap on target. 

Because the SLx 5x MicroPrism uses an etched reticle with adjustable diopter, the user will always have a clear, crisp reticle image, even if they have severe astigmatism. When set to max illumination, the MicroPrism reticle is fully Daylight Bright®. For low-light, this optic offers 3 different NV-compatible settings, accommodating any ambient light level. Paired with the AutoLive® motion-sensing illumination technology, this optic provides an exceptionally long runtime at any brightness setting.  

This package also includes the new ruggedized mounting system with industry standard mini-prism footprint, guaranteeing reliability and zero retention through heavy use and adverse conditions. Out of the box, this mount can be set for 8 different mounting heights and configurations, ensuring compatibility with any rifle system. 


  • Compatible with MR12 12 O'clock micro reflex mount. 
  • Compatible with MDOM Offset Micro Dot Mount.
  • Black anodized finish
  • 13 Illumination settings + 3 NightVision; Highest settings are Daylight Bright
  • AutoLive motion-sensing on/off battery saving technology 
  • Length: 3.31”  Weight: 8.5 oz.
  • Etched Reticle, perfect answer for astigmatism and works without illumination
  • Wide Field of View (21.0 ft @ 100 yds)
  • 50 MOA W/E Adjustments; .25 MOA Click Value
  • 8 Mounting Height Options (incl. AC & L1/3 heights)
  • Uses One CR2032 Battery (Included)
  • Up to 29,000 Hours on medium setting
  • Industry Standard Mini Prism Mount Footprint
  • Eye Relief: 2.7"
  • Lens Covers also included
  • Lifetime Warranty

The ACSS® Aurora MIL reticle is part of the patented ACSS Reticle series.

The ACSS Aurora MIL reticle is an innovative milliradian-based reticle with a comprehensive toolset for ranging and engaging targets. This reticle features a full MIL grid, which offers 10 MILs of elevation and up to 5 MILs of windage on each side. The 5th and 10th MIL markers on the grid are bracketed for quick reference while aiming. The 5th horizontal MILs feature a heavy dot.

The ACSS® Aurora 5.56/.308 Yard reticle is part of the patented ACSS Reticle series.

The ACSS Aurora 5.56/.308 reticle is a high-performance BDC reticle with a comprehensive toolset for ranging and engaging targets. This reticle uses yards-based holdovers, which are optimized for 5.56 and .308 cartridges and takes all the guess work out of getting first round

Customer Reviews

Based on 1 review
Joshua Kilgore
5X Microprism

Fantastic optic for the price and fantastic customer service! I had some initial questions about the optic I ordered (second guessing whether my choice was good for my setup) and Justin chatted with me via email to help me figure things out. His responses were prompt and very caring. Amazing experience overall!

Joshua - thanks so much for the review, and I'm glad you are happy with the product! The PA MicroPrisms are such cool little optics, I love mine!