Primary Arms 3X Red Dot Magnifier Gen III

Manufactured by Primary Arms
MPN: 510001
Manufactured by Primary Arms
79 Reviews

In Stock

Standard orders will ship out in 1 business days or less 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. NFA items will take longer to ship and are dependent upon ATF processing times.

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. Click here for details



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
ManufacturerPrimary Arms
Optic SeriesClassic
Weight9.1 Oz
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



Love the magnifier. Would purchase again solely on product, but the service was beyond expectations after I made a mistake and ordered wrong item. Thanks!

Great product from a place with great service!


Magnifier works great, mount is very well-built and sturdy, love workin with you guys!

Excellent Product


Matched perfectly with AA red dot. Thanks Primary Arms.

gen 3 magnifier


nice an clear works well you might want ler magnifier since eye relief very critical with this magnifier I wish I had

Primary Arms 3x Red dot magnifier ( gen lll )


Nice magnifier for the price , I only wish I had bought a flip to the side mount . One other thing , if your using a RDS you"ll need to buy a 1" riser to get a clear site picture.

Good value


Now while I should have got the extended eye relief model I can't fault this one, it's very clear and with the standard height flip to sight mount it lines up perfectly with my micro red dot. However I do wish it came with some kind of lens cover I got a scopecoat for an eotech 3x magnifier and it fits great

Primary Arms 3x Red Dot Magnifier (Gen 3)


Ordered this for my son as a Christmas gift, the magnifier is well made, the glass is clear, and the P.A. flip base is solid. I wouldn't hesitate to purchase another for my own AR.

great product


Ordered this one evening, it was shipped out three following morning. Super fast service. Magnifier is clear and seems well made. Very pleased with my purchase.

Good product for the price


Overall I'm satisfied with this piece. Not ideal eye relief but I also understand that you get what you pay for. It works and that's what matters. I am very satisfied with the customer service and if there were six stars I would give them six. Knowledgeable staff and fast shipping. They made a new customer.

3x magnifier gen 2


Primary arms is the best !! Hands down , best prices and quick delivery ....every delivery is within 3 days....the 3x magnifier gen2 I purchased gives me a clear view up to 100 yards , I hit 8 inch steel targets from that far