Primary Arms SLx MD-25 Rotary Knob 25mm Microdot - 2 MOA Red Dot - Red Dot Bright™

Manufactured by Primary Arms
MPN: 810005
Manufactured by Primary Arms
98 Reviews

Out of Stock

Receive FREE shipping on your entire order when you purchase this item.
For individual Officer, First Responder, and Military pricing please make sure you are logged in. for details



After rigorous field testing, this optic has been given a Silver-tier rating by the National Tactical Officers Association.

This Primary Arms red dot sight 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.

The humble microdot is a hard-to-beat package when you want speed  without adding a lot of weight to your firearm. The venerable 30mm red dot is a great option for shooters who prefer to have speed AND a wide field of view through their optic. The SLx MD-25 is here to offer the perfect balance between the two with a compact design that weighs barely 2 ounces more than a standard microdot, yet offers the same field of view as a 30mm red dot! Add in super bright, daytime illumination, an up to 50,000-hour battery life, and the next generation ruggedized micro mount and you'll see how we're pushing the envelope for fast, lightweight optics!

  • Wide field of view
  • Compact, lightweight, and durable
  • Crisp 2 MOA red dot
  • Up to 50,000 hour battery life (5+ years) at medium setting
  • Uses one CR2032 battery (included)
  • Next generation ruggedized mounting system
  • Includes risers and spacers for mounting to 0.96”, 1.41”, 1.54”, or 1.64” central height
  • Compatible with standard micro mounts
  • Fully multi-coated anti-reflective lenses
  • 12 Illumination settings for bright days and night vision compatible
  • Just 3" long and 6.5 Oz.
  • Fog resistant

The SLx 25mm Red Dot been equipped with the next generation ruggedized mounting system. We’ve upgraded everything about the mount from materials and finish to the design to create a mount that will not just clamp securely to your rail, but stand up the rigors of real-world use. Integrated recoil lugs help lock your mount in place against the heaviest recoil while large diameter crossbolts give you significantly improved clamping power and will hold up to significant torque. The included riser is the perfect height for AR-15s and AR-10s, but can be easily removed to for installation on AKs, shotguns, and more.

The SLx 25mm red dot includes the low base, a standard riser, and two different height spacers, as well as appropriate mounting hardware. With just the low base, a central height of 0.96” can be achieved. Add the standard riser for 1.41”. With the riser and thin spacer, your central height will be 1.54”. Using the thick spacer will place the optic at 1.64” height. With these options you can easily configure your optic to perfectly match your firearm and shooting style.
See More


Battery Life50,000+ Hours
Battery TypeCR2032 3V Lithium Coin
BrandPrimary Arms
Brightness12 Settings
Click Value1/2 MOA
FinishHardcoat Anodized
Mount CompatibilityAimpoint Micro
Night Vision CompatibleNight Vision Compatible
Optic SeriesSLx
Reticle2 MOA Dot
Reticle ColorRed
Weight6.5 Oz.
  • IV8888 Reviews Primary Arms SLx MD-25
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

98 reviews


Ruger PCC 9MM


Does the sight mount to the Midwest Ind mount for their hand guard?
It also has the 4 small corner screws.

Loving it

by -

Just mounted this on my CZ Evo and its like this sight was made for it. Love the different height options, rock solid mount. Now only if PA would take the GLx Prism body and make it a 4x for my AR, I'd be in heaven.

Diamond in the Ruff


Excellent glass, Daylight bright, Multi use reticle (Shotgun)DOD with holdovers is a blessing, Solid manufacturing, Positive MOA clicks, worth every penny if your looking for an optic that is more intuitive than just a "dot"

My only disappointment is no "Etched Reticle", please consider upgrading this optic PA it deserves it. Ty.

Better in pairs!

by -

I so loved the 1st one that I had to order a 2nd. Absolutely love this device!

Revolver Mounted

by -

On advise from a very helpful and informative dude from Primary Arms, I mounted the SLX MD-25 on a Ruger SRH in 480 Ruger and I am impressed. I have the MD-25 on some other stuff and it has been a great performer. Lead slangin time!

Excellent value.

by -

Liked this optic so much,I just bought another for my Henry Big Boy.

Great optic!

by -

Light look and feel. Crystal clear lenses. Crisp dot that can change size by adjusting brightness. Add the anti-glare attachment for easier use in bright sunlight, it is actually a screw on fine grid, but when aiming you don’t even see it.


by -

Primary Arms is now my first stop when it comes to optics. This one feels very well build, 25mm field of view is great, glass is very clear, the dot is crisp, the price is right. Extremely fast processing & shipping. Great product!


by -

Liked this red dot so much,I bought a 2nd one for my Henry Big Boy. For the price, there is a lot of value.

Great for shotgun, Rifle barrel.


Great 0ptic for my shotgun, used other receptacle scopes and not even close to this red dot. Held up nice for a shotgun, the only problem I got is for the price they should of threw in some lens covers with all the other mounts why not?