Primary Arms SLx Advanced Push Button Micro Red Dot Sight - Gen II

Manufactured by Primary Arms
MPN: 810023
Manufactured by Primary Arms
13 Reviews

In Stock

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This red dot sight is part of our SLx optics line. SLx optics built our reputation for innovation, reliability, and value. All SLx optics undergo rigorous field-testing during development to best serve you in any environment.

The Primary Arms SLx MD-20 Micro Red Dot Sight is the perfect blend of the advanced technology and features of our SLx MD-25 red dot and the form factor of our wildly popular MD-ADS! The newly designed body is aggressively styled and features low-profile, shielded adjustment turrets to minimize the risk of snagging in rifle cases or the bush. Our new high-power emitter provides true Daylight Bright settings on the high end yet retains both night vision compatibility and the 50,000-hour battery life you have come to expect. To further boost that battery life, the SLx MD-20 is equipped with AUTOLIVE™ motion activation. This feature turns off the optic when not in use and immediately comes back to life when it is moved, extending both the battery life and the life of the emitter. Compact, durable, and powerful, the SLx MD-20 is the perfect optic for your next build!

  • AUTOLIVE Motion activation
  • 50,000-hour battery life
  • Low profile turrets
  • Ambidextrous top-mounted push button controls
  • Fits any industry standard micro mount and gives stated cowitness
  • Uses (1) CR2032 battery (included)
  • Ultra-sharp 2 MOA dot
  • Just 3.8 oz with battery
  • Fully multi-coated anti-reflective lenses
  • High-powered emitter for Daylight Bright illumination
  • Night vision compatible
  • Absence of parallax shift past 33 yards
  • Waterproof to 6ft. with turret caps on
  • Water-resistant with turret caps off
  • Fog resistant
  • Bikini lens cover included
  • Lifetime Warranty
See More


Battery Life50000 Hours
Battery TypeCR2032 3V Lithium Coin
BrandPrimary Arms
Brightness12 Settings
Click Value1/2 MOA
FinishHardcoat Anodized
Manufacturer.Primary Arms
MaterialAluminum - 6061-T6
Night Vision CompatibleNight Vision Compatible
Reticle2 MOA Dot
Reticle ColorRed
Weight3.8 Oz

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see

Ratings & Reviews

13 reviews

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Great light.

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Stays zero. Great Shake Awake feature. Used it on my Glock Micro Conversion Kit Gen 2. Prefer it better than Vortex RD.

Great budget red dot


I ordered in early January and received it within 4-5 days, slower than the usual 2 day primary arms shipping but everything has been moving slower lately. Upon opening the red dot you quickly notice the quality, definitely doesn’t feel like a budget piece of gear. The brightness buttons are robust yet easily manipulated and the adjustments have a nice click when turned. I swapped out the factory ultra low mount with a Geissele absolute co witness aimpoint mount. Once I got it on the rifle I was in love. I’m not sure if it ever turns off or if the shake to wake feature is actually working but it’s always ready when I pick it up and shoulder it.haven’t shot it much with this nasty weather but my initial outing left me impressed. Would recommend to anyone, if anything changes I’ll update.

Good red dot


Mounted on an AK using the RS regulate mounting system. So far, hold zero well and battery life seems fine. Tracks well and glass is of good quality. No fish eye or any funky anomalies. Overall, Id buy it again.



It's like the Gen one but way better.
<br>-Better glass
<br>-Better lens coating. Less red glare
<br>-Adjustment turrets are made out of stainless steel
<br>-better aesthetics
<br>-better finish
<br>-better low mount
<br>-lifetime warranty
<br>-affordable price

Primary Arms SLX Gen 2 Micro Dot

by -

I received this sight, mounted it and zeroed it on my Air Force, .45 Cal Texan. So Far so good. The controls are easy to operate and the dot is crisp and clear.

Great Sight

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I picked up one of these due to the reputation of Primary Arms’ optics and the auto awake/sleep feature. The dot is very clear and crisp even with my astigmatism. The glass is also very clear as well. The push buttons have a nice tactile feel and easy to manipulate. Mated this with a standard Primary Arms mount on an AR9 and it was rock solid. Very easy to dial in and was shooting nice tight groups at 25’. I also have a Sig Romeo 5, which is also a great sight, but I prefer the MD-20 to it due to the clarity. Overall a great buy for the money.



I have astigmatism and this dot is cleaner than the MRO I had. Hitting 10" steel at 150yds no problem at the brightest point of the day. Backed by Primary Arms incomparable customer service, you can't go wrong. Buy it.

Don’t hesitate!


Excellent micro dot at twice the price! Best PA micro dot yet. The look, feel, and performance will satisfy even the most discriminating shooter.

Good red dot sight


I put this sight on my AKV which looks nice because it is small and not big like other red dots. I zero the sight and shoots tight groups. I just wish I had more ammo because it is fun to shoot with this sight. Also the price was just right. If you thinking of getting this red dot sight get it because you are going to like it.

It works for 5.56

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I wanted this for my 300BO but that was a waste of ammo. I'd boresight it, shoot, miss the target and recheck with the boresight and the dot would be waay off. Went back and forth a couple times thinking I was the moron. Gave up and put it on a 5.56 build and it seemed to hold zero. Will reconfirm next range trip. Should've stuck with aimpoints