Primary Arms MD-RBGII Classic Series Gen II Removable Microdot Red Dot Sight

Manufactured by Primary Arms
MPN: 810011
Manufactured by Primary Arms
224 Reviews

In Stock

Standard orders will ship out 2 business days if ordered by 3:30 pm CST, Monday-Friday. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination.

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The Classic Series™ proves that entry-level optics don’t have to be poor-quality optics. Unlike some other brands, we don’t use the word “value” as a euphemism for “junk”. Classic Series scopes are perfect for the budget-conscious and the new shooter. We take the time to 100% inspect every product in our facility here in Houston to ensure you are receiving the best quality product as our other three tiers. These scopes are backed by the same excellent customer service and support as all other Primary Arms products.

This Primary Arms Microdot sight is our second-generation model that comes in at an affordable price while retaining excellent quality and durability. We have included a MIL-STD-1913 Picatinny rail mount with this red dot sight, so you can attach it to your rifle right out of the box in a matter of seconds and head to the range to get it sighted in. Alternatively, the mount is removable and features mounting options for other standard microdot riser mounts, so you can customize the height and co-witness with your iron sights. Adjusting the zero of the dot is made easy with the 1/2 MOA audible click adjustments that are protected by aluminum caps. Also included with this optic is a bikini lens cover to protect the glass when not in use. If you are in the market for a red dot sight for hunting, target shooting, or competition, you can’t go wrong with the Primary Arms Microdot.

  • Approx. 1,000-hour battery life at medium setting
  • Daylight Bright illumination
  • Uses one CR2032 battery (included)
  • Includes removable Picatinny rail mount.
  • Compatible with standard micro mounts and gives stated co-witness
  • Crisp 2 MOA red dot
  • Fully multi-coated anti-reflective lenses
  • 11 Illumination settings for bright days and 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

This micro red dot sight features 1,000 hours of battery life on a single CR2032 battery with 11 different illumination settings that can be quickly cycled through for use at night or on a bright day. This red dot sight is even compatible with night-vision equipment to further extend its range of uses. The 2 MOA red dot is extremely crisp and allows you to take quickly aimed shots at short range while still giving you the ability to make effective shots at medium ranges. The glass that the red dot is projected on is fully multi-coated to reduce reflection and provide a clear sight picture. The glass and electronic internals are covered by a durable, black hard coat anodized, 6061 aluminum housing with O-rings providing protection from water and fog. Because we are so confident in this microdot, we decided to offer it with a lifetime warranty. If you are serious about home defense or target shooting, this red dot sight will get the job done.

Built on the foundation that customer service is the most important product/service a company can offer, Primary Arms is dedicated to meeting the need of every customer with the utmost respect. Not only do we provide excellent customer service, but we also offer fast shipping and competitive prices on everything we sell. If our foundation is customer service, then our structure is the increasing line of high-quality, dependable optics designed right here in Texas. Our goal; to provide firearms enthusiasts, professional shooters, and servicemen, and women the right tools for the job at an affordable price.
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Battery Life1000 Hours
Battery TypeCR2032 3V Lithium Coin
BrandPrimary Arms
Brightness11 Settings
Click Value1 MOA
FinishHardcoat Anodized
ManufacturerPrimary Arms
Night Vision CompatibleNight Vision Compatible
Reticle2 MOA Dot
Reticle ColorRed
Weight4.2 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

Excellent red dot


I just got a Aimpoint H1 and the Primary Arms is very similar. Same size, mounting base, etc. Does not appear to have NVG settings, or limited settings....but then I don't have/use NVG's. Great red dot for the money!

Perfect Purchase


I just purchased my first red dot and it arrived very quickly as promised. I had some questions about mounting and sighting in, so called twice and was helped by knowledgeable, patient and thorough sales staff. Really appreciated doing business with you, Primary Arms will be my go to for AR supplies. Thanks!

First impression - Great optic for the money


I just received my MD-RBGII in the mail and opened it up. This is my first PA optic and I have to say I am impressed. I have two Aimpoint T-1 optics to compare it to. I am impressed with the clarity and lack of coloration on the glass. There is a very slight green coloration to the glass, but nothing to complain about. The 2 MOA dot looks true to form. Looking through the optic using my Eotech 3x magnifier it appears there is a small tail going up from the dot, looking with the naked eye it is not noticeable notice. I do have a slight astigmatism, so this may just be my issue, but I don't get the same issue with a Aimpoint T-1 and the magnifier. I am going to be using this optic on a Kel Tec PLR-16 and Saiga 12 for testing, but eventually I plan on mounting it on a AAC 300 Blackout H&R Handi Rifle long term.Judging my by initial impression I would not hesitate to order another one of these or recommend them to friends. Now I understand all the PA hype.

awesome product


I love this little optic. It was super easy to mount and even easier to zero in. Also sets up perfect with my 3x magnifier. All in all just a great product at a great price. I'd recommend this optic to anyone looking for a nice small optic and will be buying another for my next build.



I love this sight. saved me a fortune compared to h1/t1. I have 9k rounds thru my 300 blackout and its been 90 outside with 100 percent humidity and its recently been 22 outside and going from inside to freezing cold and back in house , no fogging or moisture inside and ive banged it a few times and it is still on zero. not a t1, but the best alternative I've ever tried

Great Bang for the Bucks


I ordered the PA MD-RBGII with an absolute co-witness mount for a 10.5" AR I recently acquired. This is my first PA red dot and I must say I'm very happy with it. I wanted something small and light for this range toy and was not concerned with "forever†battery life since it will remain “off†most of the time. The 2 MOA dot is clear and crisp, better than the TRS-25 (3 MOA dot) and very close to those on my Aimpoints. Mounting the unit was fast and easy and performance on the range was excellent. As with all my previous orders, PA’s shipping and communication was first rate all the way.

Good optic


I ordered this with the intention on using it for an AR15. I decided to go with PA 2.5X compact scope. It is not a bad product by no means. I will order one in the future but it will be the push button version.

Great Red Dot


I own an Aimpoint Micro T1 and cannot tell the difference in clarity between your new Red Dot and the Aimpoint. I recognize the battery wont last as long but since I am not in combat and don't need to keep the unit on continuously it's a small point. I have three primary Arms Micros of various generations and have had no problem with any of them.

Good affordable micro red dot


I own an Aimpoint pro but wanted a new optic for my newly built AR. This is a phenomenal optic for the price. I paired it with an American Defense quick detach mount and I'm super happy with it. Zeroed quickly after install and holds zero perfectly. If you're looking for a quality red dot without breaking the bank, this is the optic for you.

For my purposes Outstanding


I own many AR style rifles and other rugged use gear. Red dot sights have been my main go-to when it comes to any style optic out there.I started playing with them back in the early days of woods play paintball ,and was using PAs early products then,and they went through as much simulated rough use as I could tolerate,and never failed.They have done nothing but get better as the years have passed.i own one of the top name micro dots,on a Larue quick detach mount,I also own 3 of the latest PA micro's one of them being the push button model,2 of them with the Bobro quick mounts. Non of these are on paintball guns anymore and the bug out rifle is wearing the newest button model PA dot / Bobro mounted,and if that's all I got out with ,I wouldn't even worry about it.Anyone asking my opinion or seeing my gear at the range or a shoot,would be recommended to save your bucks but don't feel short changed going with one of the Primary Arms micro red dots....