Primary Arms 3X Red Dot Magnifier Gen III

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

In 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. 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
Manufacturer.Primary 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

Great Service


As usual, amazing service and rapid delivery. I can't say enough for PA and their products. Definitely a customer for life.

Great product


Awesome quality,crystal clear glass and fast shipping!!!

Goes with the PA Red Dot!


Bought this with the fold away mount and I am thrilled with it. The eye relief could be better, but it fits so nicely on my AR-15 with my PA Red Dot too. I am a return customer for a reason. PA delivers super fast at the most affordable price.

Good quality optic


Can't argue with the other reviews, this is a great magnifier for the money. This teamed with the raised EOTech mount to accommodate a 516, works great.

Awesome service


Everything was just as it should be and customer is service is top notch!



Exactly what I was hoping for. Mounts great, lines up well... can't wait to put it into action!

Primary Arms 3X Red Dot Magnifier


Eye relief could be better

primary arms 3x magnifier


Good delivery and product is just as described, works well with my Vortex red dot scope.

Much better than I expected,


Got this in a package deal with an eotech 512. Once I got set up and the magnifier mounted, wow, it's really quite good. The clarity and light transmission is outstanding. I don't mind the short eye relief, seeing how I have it mounted on my top rail I couldn't move it forward anyway. A+++ to Primary Arms for including this, what a killer deal!

Nice for the Price!


Got this in a Red Dot bundle package. It does the job and I didn't have to take out a second mortgage on my house! Primary does it again!