AT3™ 4xRDM™ 4x Red Dot Magnifier with Flip-to-Side Mount

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Go from fast up close to precise at long range, with AT3’s new 4x Magnifier with QD Mount

Experience the latest and greatest AT3 Red Dot Magnifier, with a new Quick Detach mount and a crystal-clear 4x magnification for any AT3 Red Dot Sight.


  • Easy upgrade to extend the range of any red dot sight with 4X magnification
  • Quickly transition between short- and long-range shooting scenarios. Just push the button and flip the magnifier over.
  • Spacers are included for Absolute and Lower 1/3 Cowitness Red Dot Sights – whatever your sight height, the magnifier will work!
  • The Quick Detach Mount means you don’t need to carry extra weight if the job doesn’t demand it – just flip the lever to add or remove


  • Crystal-clear multi-coated optics for a sharp sight picture
  • Adjustment screws make it simple to center the red dot in the sight picture
  • Fast focus adjustment ensures a crisp sight image


  • Sturdy flip-to-side mount with a positive locking mechanism, made of durable 6061 T6 aluminum matte anodized finish
  • The shockproof optic is built to withstand the recoil of any weapon, including shotguns and large-caliber rifles
  • Scratch-resistant optical coating
  • Backed by the AT3 Lifetime Warranty

Important fit note:

This magnifier is designed for use with the AT3 RD-50 PRO and LEOS Red Dot Sights, as well as many other sights that use riser mounts.  The included spacers correspond to most “Absolute Cowitness” and “Lower 1/3 Cowitness” riser heights for red dot sights.  Installation of either spacer is simple and allows you to have more accurate


  • Magnification: 4x
  • Objective Lens Diameter: 32 mm
  • Height: 1.4in from the base center of the optic (Absolute Cowitness). With the use of the spacer, height is 1.57in
  • Eye Relief: 2.5 in
  • Exit Pupil: 7.0mm
  • Field of View: 49 ft @ 100 yds
  • Length: 4.6in
  • Weight: 12oz with mount
  • Optics Coating: Fully multi-coated
  • Material – 6061 T6 anodized aluminum
  • Included in the box: QD flip to side mount, 4X magnifier, Hex key, Stamped Wrench, Lens Cleaning Cloth, Spacers, and mounting screws

Have Questions About this Product?

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

AT3 Lifetime Warranty Logo

All AT3 Tactical Brand Products carry a lifetime warranty against manufacturer’s defects.

This includes AT3 Red Dot SightsHandguardsIron Sights, and any other product that carries the “AT3 Tactical” or “AT3™” name. For other brands (ex. Magpul or Troy), please refer to the manufacturer’s warranty policy.

In the event that your AT3™ product becomes unusable, we will repair or replace the product at no charge to you.

If we cannot repair your product, we will replace it with a product in perfect working order of equal or better physical condition. The warranty is fully transferable, but we may require information about the original purchase to validate the authenticity of the product.

If your product is in need of warranty service, please contact AT3 Tactical to start the process

Our contact info is available here. To expedite processing, please provide your order information and description of the defect.

Please note: The AT3 Lifetime Warranty does not cover loss, theft, intentional damage or cosmetic damage that doesn’t affect the performance of the product.

Customer Reviews

Based on 14 reviews
Doug Bennett
AT3™ 4xRDM™ 4x Red Dot Magnifier

These things work GREAT! I have several 3x & 4x magnifiers plus their Red Dots with Laser, and all work GREAT!

Thank you for the kind words! We are glad to hear that our products are serving you well.

Cody W
Worth every penny

This is the first magnifier I have purchased after casually browsing them for the past two years. Got this on the 4th of July sale, and for 100$ I'm absolutely blown away by the quality. It's sturdy, crisp, good fit and finish. I'm using this backed up to an Eotech 512 and it lines up perfectly without a riser, I didn't even have to adjust center. My rough mock up test mount ended up being it's permanent location it's such an easy alignment. I didn't even know I needed a magnifier this bad until I purchased this one from AT3!

Thanks for the honest review! We're glad to hear that you're pleased with the quality of the AT3 4xRDM 4x Red Dot Magnifier with Flip-to-Side Mount.

Great addition to my AR-15

I got it as an open box return. Not sure why it was . But it works great and operates as it should I’m hitting targets at 130 yards with ease.

Thanks for sharing your feedback! We're glad you're satisfied with your purchase.

Matthew Lewis
Great product!

My customers absolutely love them. Great job you guys!

Thanks for sharing your feedback! We're glad you're satisfied with your purchase.

Jo L
Great quality

I bought a 3x magnifier right before the 4x came back in stock. So i sold my 3x to my buddy and picked up the 4x. The 3x seems a little more stable, no wiggle at all. the 3x was very rigid, perfect fit. The 4x has a small amount of wiggle, but i think its the price you pay to have a PUSH button instead of a pull lever. Not a deal breaker though. It appears the 3x fits better with the AT3 LEOs red dot + laser combo. I adjusted the 4x mount with the higher block that it came with and it helped snug it up a tad. But it appears to be slightly off center. Have to get used to looking through it i suppose.

For the price, rigidity, push button action lever, and the quality of the actual framework and glass - you cant beat it!

I do recommend this product, but just know that it may be slightly off center with the LEOs even after installing the taller block, and a slgiht wiggle when "Locked" into place. If you purchase KNOWING these things, you WONT be disappointed. I buy so much of AT3 tactical's gear, and i love every single item. Cant beat the price and quality!

thank you for reading the rant!
Will buy from At3 time and time again!

Thanks for sharing your feedback! We're glad you're satisfied with your purchase.