Primary Arms 3X Red Dot Magnifier Gen III

Manufactured by Primary Arms
MPN: 510001
Manufactured by Primary Arms
75 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.

Receive FREE shipping on your entire order when you purchase this item.



The Primary Arms 3X Red Dot Magnifier (GEN III) is waterproof and fog resistant. Place the magnifier behind your red dot or holographic reflex sight to instantly magnify the sight picture at 3x power. The integrated diopter provides a fast focus ability to keep the image clear. Azimuth and elevation adjustments keep the dot centered in your field of view. This tough magnifier features a lifetime warranty.

NOTE: Make sure that the mount you choose is capable of interfacing with the 30mm ring on this magnifier, because the objective is larger than the 30mm mounting area. Mounts intended to just slip over a 30mm mounting area and tighten down will not work.
See More


BrandPrimary Arms
Eye Relief1.90 in
Field View 10039.37 ft
Manufacturer.Primary Arms
Weight9.1 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

Very satisfied


Primary arms red dot magnifier is a good product for a great price

Great magnifier, Fast shipping, great service


Primary arms was excellent as always. The magnifier works great and it was a great price.

3X Magnifer


Purchased the Primary Arms 3X Magnifer and it has preformed great

PA 3X Red Dot


Received scope in good packaging and condition. Overall the scope is ok but like other reviewers have said the eye relief is a little lacking. Also noted that the finish on the magnifier is not the same as the PA scope. The scope is a flat matte and the magnifier is just flat, but there is a noticeable difference if aesthetics matter to you.

Primary Arms Customer Service


Returned due to red dot dancing during use and was issued a Return Authorization - I was told that a refund transaction was completed...but no money has been retuned to my account. After months of emails and attempts to get a refund - or even store credit the company has failed to make it right and has stopped retuning my emails. Bad customer service in this my first and only experince with PA.



Shipping and everything else is great. Items always being out of stock is annoying. Bought the 3x magnifier (gen3) because the deluxe was out of stock. I'm sure the deluxe would have suited me better but is never is stock.



Simple yet effective product. A lot cheaper then big name brands and works just as well. Of course I recommend it.

P A 3X Magnifier


So far the magnifier has been excellent. I have it mounted on my AR with a P.A. flip to the side mount behind a Primary Arms red dot sight.....I love both of them..they are an excellent set up for the money .....well worth the price.

Primary Arms 3X Red Dot Magnifier (GEN III)


The magnifier works great in combination w/ my eotech 512. The only part I don't like is it's overall length. That forces me to mount the eotech further forward than I would prefer when the magnifier is not being used.

3X Magnifier is great!!!


The Primary Arms 3X Red Dot Magnifier was better than I expected it to be. The image is very clear and centering the objective was a piece of cake. What a great product at an excellent price!