Primary Arms SLx 1X MicroPrism™ Scope - Red Illuminated ACSS Gemini 9mm Reticle

Manufactured by Primary Arms
MPN: 710051
Manufactured by Primary Arms
9 Reviews

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

The SLx® 1x MicroPrism is an all-new advanced optical system designed from the ground up in an ultra-compact housing, allowing use of backup iron sights and magnifiers. The 1x MicroPrism is part of the SLx optics line. SLx optics built the reputation for innovation, reliability, and value. All SLx optics undergo rigorous field-testing during development to best serve you in any environment. In this case, they put the optic through over 7,000 rounds of .308 through a SCAR 17s.

  • ACSS Gemini 9mm reticle
  • About half the size of the Compact 1x Prism and over 20% lighter
  • 13 Illumination settings + NightVision - Highest settings are Daylight Bright
  • 3 NightVision Settings: Low, Med & Flood
  • AutoLive motion-sensing on/off battery saving technology
  • Approx. 29,000 Hour battery life at medium setting
  • Includes 8 Mounting Height Options (incl. Absolute Co-witness & Lower 1/3 heights)
  • Length: 2.48”
  • Weight: 7.6 oz with height riser (only 5.5 oz without riser)
  • Etched Reticle, perfect answer for astigmatism and works without illumination
  • Usable Eye Relief Range: 2” to 6” with 3.6” for optimum Field of View
  • Wide Field of View (76.5 ft @ 100 yds), excellent for CQB situations
  • 120 MOA W/E Adjustments; 1 MOA Click Value
  • Fully Multi-Coated optics
  • IP67 Waterproof, nitrogen purged for fog resistance, and dust proof
  • Uses (1) CR2032 Battery (Included)
  • Lens Covers included; ARD option sold separately
  • Backed by Primary Arms Lifetime Warranty

Using cutting-edge LED technology, the SLx 1x MicroPrism offers 13 illumination settings with AutoLive® motion-sensing on/off technology and three night vision settings. At maximum illumination, the MicroPrism offers true Daylight Bright performance, while the innovative low-power sleep mode safeguards battery life for reliable ‘always-on’ storage. Though small in size, virtually no sacrifice was made for eye relief and even offers a generous field of view.

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 offers 8 different mounting heights and configurations, ensuring compatibility with any rifle system.
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Battery Life25,001 - 50,000 Hours
Battery TypeCR2032 3V Lithium Coin
BrandPrimary Arms
Click Value1 MOA
Field View 10076.50 ft
Focal PlanePrism Scope
IlluminatedPartial Illumination
Manufacturer.Primary Arms
Mount CompatibilityPrimary Arms MicroPrism, Trijicon Mini-ACOG
Optic SeriesSLx
Reticle ColorRed
Total Elevation Adjustment120 MOA
Total Windage Adjustment120 MOA
Turret Features
Weight5.5 oz.
  • Primary Arms 1x MP Optic - Perfect 9mm Optic?
  • Best Optic For Your 9mm PCC SLX1 ACSS Gemini 9mm Reticle
  • Learn More About The Primary Arms SLx 1X MicroPrism
  • 1x Micro Prism by Primary Arms | Tactical Rifleman
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

Ratings & Reviews

9 reviews

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Excellent scope!!

by -

This thing is excellent!! I've bought 5 total. 1x 9mm, the rest 5.56. I highly recommend this for people with astigmatism and without. Not needing the battery (etched reticle) and 1x is a game changer for this guy. Quick zero, I mean quick! You'll need to change your mindset, as the BUIS will no longer cowitness. I've been nothing but impressed!!

Works on my Stribog


I have two of these. One in 9mm and the original calibrated for 5.56. These are extremely rugged. Mine is currently on a Stribog A1 and has worked as advertised.

If you’re concerned with an EMP or battery running out, this is the best option compared to a red dot. This is also easier to use than an LPVO on 1x. I cannot reiterate how solid this optic is and how clear the glass appears. This is very bright and visible while looking at light colored targets in direct sunlight.

the best


This is by far the coolest and best optic for your 9mm carbine. I have mine on my ruger pc charger and am able to easily engage targets out to 200+ yards. The ranging feature on the reticle is pretty neat, glass is clear and mounting options are super awesome!



I am so impressed with this optic and more than likely be replacing my other expensive rds with this due to the etched reticle, eye relief, and clarity. I cant speak to the durability yet but there are others that have done this on social media. Buy this without hesitation!

Game changer


Truly the future of 1x optics, I find this far superior to a red dot you have BDC, chevron for precise shots. You can see the reticle from like 2 feet away so eye box is tits feels like red dot but then you have a much more robust optic because prism scope are notoriously bomb proof.

Adaptable Reticle


I have some bad eyes and some astigmatism. The 5.56 Reticle is really nice but has a lot more details which are harder for somebody like me to make out.

So I opted to put this 9mm Reticle on my 5.56.

Turns out (Based on Ballistic Calculator Models) 16 " barrel 9mm Bullet Drop measurements for 75, 100, 150 and 200 end up being useful for measuring 5.56 Bullet Drop for 250, 300, 400 and 500 yards.

(Both rifle and pistol sighted in at 50 yards with 115/55 grain ammo)

This won't be perfect but I'm not a perfect shooter.

Much better than red dot for me

by -

This is a great little optic. Very clear glass with minimal distortion overall. The etched reticle can be focused to the eyeball (with or without astigmatism) of each individual user, and continues to function just fine without battery. For my purposes this is far better than a standard red dot.

Red dot for guys with astigmatism.

by -

Great, crisp reticle even without my glasses. Easy to shoot with both eyes open. Image isn't completely flat but it's close enough. Especially for the price it's a solid optic that works fine without batteries.

Great except for use under NODS


TLDR: Great optic for normal lighting etc BUT the night vision settings are so bright they completely wash out the optic making it unusable.

Got these slx optics for a couple of my rifles and recently got a nocturn industries tanto. Sadly these optics are blinding under nods on the night vision settings which is a huge bummer. Aside from the nod incompatibility this line of prism optic is my favourite for my go to armalite. They hold zero easy-to-use and give the best of both worlds and you wont drop a grand on them. The etched reticle is great and the illumination are superb.