OPEN BOX RETURN AT3 RD-50™ Micro Red Dot Reflex Sight

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Returned items may be scuffed or scratched, packaging may be damaged. Guaranteed functional + lifetime warranty!

Accurate. Dependable. Unbeatable Value in a Small Package.  Now with your choice of Clearance Riser Mount!

Only 3.6 ounces and 2.4 inches long, the AT3 RD-50 Red Dot sight is specifically optimized for the AR platform, but also ideal for shotguns, handguns, hunting rifles, and any other weapon with a picatinny rail.


  • Crisp 2 MOA red dot allows for accurate, both-eyes-open shooting.
  • Parallax free design: The red dot stays on target with following the movement of the user’s eye.
  • 11 red dot brightness settings provide optimal visibility in any light conditions.
  • Multi-coated, scratch resistant amber lens provides enhanced image clarity.


  • Fully waterproof, with rubber gaskets on turrets and battery cover.
  • Nitrogen filled 6061 T6 aluminum body resists fogging and moisture.
  • Matte black anodized finish resists scratches while keeping a stealthy profile.
  • Shockproof circuitry resists damage from rough handling.

Unbeatable Value

  • Exceptional battery life – up to 50,000 hours at the lowest brightness setting.
  • Genuine Renata™ CR2032 Lithium battery included.
  • Factory direct pricing – no distributor markup.
  • Backed by the AT3 Lifetime Warranty. We stand behind our products!

Inside of the box:

  • Red dot sight
  • Rubber bikini cover
  • Instruction sheet
  • Lens cloth
  • Allen wrench

Red Dot Sight Technical Specs

  • Power / Obj. Lens: 1x25mm
  • Reticle: 2 MOA Red Dot
  • Lens Coating: Multi-coated
  • Weight: 3.6 oz
  • Mounting Length: 1.1 inch / 28 mm
  • Total Length: 2.4 in / 61.8 mm
  • Exit Pupil: 22mm
  • Battery Type: CR2032 (Renata™ CR2032 Battery Included)
  • Battery life: up to 50,000 hours on lowest setting. Approx. 5,000 hour with typical use
  • Windage/Elevation Click Value: 1 MOA per click
  • Adj Range: /- 35 MOA (total adjustment range 70 MOA)
  • Eye Relief: Unlimited
  • Parallax Adjustment: Fixed
  • Field of View: Unlimited
  • Night Vision Compatible: No
  • Nitrogen filled: Yes
  • Waterproof/Fogproof: Yes
  • Recoil resistance – Certified up to 500g’s. Certified for use with large-caliber rifles and shotguns, as well as “springer” airguns with 2-way recoil
  • Body material: 6061 Aluminum
  • Finish: Matte black anodized

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Customer Reviews

Based on 95 reviews
excellent sight

Very high quality sight for a very good price. Highly recommend

Todd Dennison
Great product at a great price

I'm really pleased with this red dot. I needed light weight and small profile and this is exactly what I needed.
I'll be getting another next time I need a red dot.

Damian Allen

Excellent sight works flawless

Anthony Dagostino

I decided the purchase this product after watching a review on YouTube. The guy bashed, threw it, and shot it with a shotgun and the sight still held up. So I decided to give it a try. I saw the open box offer and thought what the heck. When it came in the mail I was pleasantly surprised that the sight looked and functioned like new. The dot was nice and the sight it’s self felt like it was made well. The brightness selector is a bit stiff but I don’t mind that. It mounted well to my Cz scorpion and co witnessed with the scorpion sights perfectly. I haven’t shot with it yet but I did do a little “water bottle test by self to see if the dot moved from being aligned with the irons. It held up great and can’t wait to shoot with it. Also got an email from at3 with some info about them which I like to see. I emailed back just to them I loved the product and they responded to that as well. Seems like good customer service and seems like a great company. I would buy another one and I probably will

Shaun Kallina
Damn Thing Sure Held 0

I'll say, damn good job AT3 Tac! This little bastard kept me opening wide holes on the paper; I say wide because I was excited breaking my first build's cherry and it had been some time since I pulled a hot trigger, so I was off some, yet the hole I broke through that paper was consistent. You should be expecting another purchase, a buddy who gave my Black Betty a finger in the hole plans to buy one of y'all's optics. My RD-50 held zero through approximately 450 rounds for her first go in the range sack, yeah, boy howdy, I'm satisfied, mmm good shooting!

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