AT3’s Smallest and Most Versatile Micro Red Dot Sight
Even a great sight can be made better. In addition to all models now shipping with a rubber cover, the ARO’s housing is smaller, allowing it to ride on top of your red dot pistol slide cut for Fastfire or Venom pattern optics. The ARO still boasts the largest viewing area of AT3’s Red Dot Sights, and it can be used on just about any rifle or pistol platform. As a primary or backup optic on your AR, a sleek reflex sight for your hunting rifle or shotgun, or even riding on a pistol slide, the ARO can do it all – at a price that won’t break the bank.
Need a Mount for a Pistol?
Built For Every Platform
The ARO reflex sight is built to take on just about anything! It can be used on rifles, shotguns or your favorite optics-ready pistol.
A Dot with a View
- This is our smallest red dot sight, with the biggest viewing area – with none of the bulk of a standard tube
- Multi-coated lenses are scratch-resistant and provide excellent image clarity
- Crisp 3 MOA red dot allows for accurate, both-eyes-open shooting on any platform
- Parallax free design: The red dot stays on target, no matter where the shooter’s eye is
- 6 red dot brightness settings provide optimal visibility in any lighting conditions
Truly Adaptable
- The ARO uses a Fastfire/Venom Style Mounting Footprint and includes a removable Low Mount for Picatinny or Weaver Rails
- We also offer a .83″ Absolute Cowitness Cantilever Riser Mount for Picatinny Rails – Ready for Duty with your AR15
- Mount it on your rifle, shotgun, or pistol – the ARO is built to take on just about everything!
- Waterproof circuitry ensures you’ll stay on target even in adverse conditions
- Shockproof circuitry resists damage, even when the dot takes a beating – from impact or recoil
AT3’s Most Versatile Red Dot
The ARO Reflex Sight is able to be directly mounted to many popular “Optics Ready” pistols on the market that utilize a Burris Fastfire/Vortex Venom mounting pattern – either directly on the slide or via an adapter plate. Here is a list of pistols that the ARO is compatible with. This may not be a complete list. If you know of another pistol that the ARO fits on, please email us that information at support@at3tactical.com. If you have specific questions about the ARO fitting on any pistols, please contact the gun manufacturer directly.
Manufacturer |
Model |
Beretta | APX RDO |
Canik | TP9SFx |
Canik | TP9 Elite Combat |
FN | 509 Tactical |
FN | 509 Compact MRD |
FN | FNX 45 |
Glock | G17 Gen5 MOS |
Glock | G19 Gen5 MOS |
Glock | G22 Gen5 MOS |
Glock | G23 Gen5 MOS |
Glock | G34 Gen5 MOS |
Glock | G40 Gen4 MOS |
Glock | G41 Gen4 MOS |
Glock | G45 MOS |
H&K | VP9 Optics Ready |
Ruger | 57 |
Springfield Armory | XD-M OSP |
Taurus | G3C TORO |
Taurus | G3 TORO |
Walther | PDP FS 4 |
Walther | PDP Compact |
Walther | Q4 SF Optic Ready |
Walther | Q5 Match |
Walther | PPQ M2 |
If you have other questions on pistol red dot mounting solutions, be sure to check out the Optics Ready Pistol Bible!
High Value, Light Cost
- No other Micro Red Dot has an AR-ready riser mount at this price.
- The ARO is factory-direct – no markup from distributors.
- Up to 5,000 Hours of Battery Life at Medium Brightness
- CR1632 Lithium battery included.
- Backed by the Lifetime AT3 Warranty. We stand behind our products!
About Riser Mounts
- No Mount – For Direct Mounting to Fastfire/Venom Adapters and Slides
- Low Mount – For Direct Mounting to Picatinny or Weaver Rails
- Med Profile .83” Riser Mount – Mounting to Picatinny Rails for Absolute Cowitness with AR iron sights
Not sure what that all means? Check our FAQ below!
Inside the box:
- ARO Red Dot Sight
- NEW Rubber Lens Cover
- CR1632 Battery
- Low Picatinny/Weaver Mount
- Instruction sheet
- Lens cloth
- Allen wrench for Windage Adjustment
- Torx Wrench for Mounting Screws
- Flathead Screwdriver for Battery Cap
- OPTIONAL: .83″ Absolute Cowitness Picatinny Riser Mount
Red Dot Sight Technical Specs
- Power / Obj. Lens: 1x23mm
- Reticle: 3 MOA Red Dot
- Lens Coating: Multi-coated
- Weight: 1.8 oz
- Mounting Length: 1.9 inch / 48 mm
- Mounting Width: 1.1 inch / 28 mm
- Height: 1.2 inch / 30 mm
- Objective Lens Area: 23mm x 21 mm
- Battery Type: CR1632 (Battery Included)
- Battery life: Approximately 5,000 Hours on Medium Setting
- Auto Shut-off: 6 Hours
- Windage/Elevation Click Value: 1 MOA per click
- Adj Range: +/- 50 MOA (total adjustment range 100 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
ARO Cantilever Riser Mount Technical Specs
- Mount Type: Burris Fastfire/Vortex Venom Footprint
- Length: 1.6″
- Material: Black Anodized Aircraft Aluminum
- Saddle Height: .83″
- Weight: 1.1 oz
Frequently Asked Questions
Q: How do I mount the ARO to my pistol?
A: The easiest way to mount the ARO to a pistol slide is by using an adapter plate in the Fastfire Pattern. AT3 carries adapter plates that can be used simply by drifting out the rear sight of many popular pistols on the market. The ARO may not fit in pistol slides cut specifically for Fastfire red dot sights.
Q: How do I know which riser mount to get?
A: For AR’s and other modern rifle platforms, we recommend the .83″ Mount if you are running without iron sights since it puts the red dot at the standard height of mil-spec iron sights. If you’re running a shotgun, pistol, or any firearm with a “drop comb” where the cheek rest is lower than the top of the receiver, the Low Mount will serve you just fine.
If you go with the .83″ Mount, you’ll also get the Low Mount – if you plan to move the optic around multiple platforms, go with that option!
Q: Do I need to use iron sights along with the ARO Red Dot Sight?
A: NO – Iron sights are not required to use this red dot sight! The red dot sight can be used on its own. Many people choose to use iron sights as a backup, but they are optional. This red dot sight will work great on “optics ready” rifles that don’t have any iron sights.
Q: What is the recommended torque for the top screws that thread into the mount? Do I need Loctite/threadlocker?
A: We recommend no more than 12 inch-lbs for torque on the two top screws, no matter what you’re mounting the ARO to. You do not necessarily need threadlocker, but it is highly recommended, especially on handguns. A small drop of Blue Loctite or equivalent medium threadlocker on each screw will suffice.
Doctor Optic Firearm Compatibility
Also known as Fastfire, Noblex, Venom, etc
This optics compatibility chart is continuously updated based on the latest available information, but firearm and optics platforms evolve rapidly. If you notice your firearm isn’t listed below, please reach out to us directly: Contact Us.
Doctor Footprint Compatibility Notes:
– Direct Mount: Mounts Directly to Slide
– Mounting Plate Required: Purchased Separately
– Mounts with Factory Adapter Plate: Included With New Firearm Purchase
BERETTA
Mounting Plate Required:
Mounting Plate: 92X Performance, M9A4, 92X RDO Full Size, M9A4 Compact, 92XIM, M9A4 Centurion
Mounts with Factory Adapter Plate:
APX A1 Full Size, APX A1 Compact, APX A1 Tactical, APX A1 Carry
CANIK
Mounts with Factory Adapter Plate:
TP9SFX, TP9 Elite Combat
CZ
Mounting Plate Required:
Mounting Plate: Shadow 2 Compact Optics Ready, Shadow 2 Optics Ready
Mounting Plate: P-10 C OR, P-10 F OR, P-10 S OR
FN
Mounts with Factory Adapter Plate:
502 MRD, 502 Tactical, 509 Fullsize MRD, 509 Midsize MRD, 509 Compact MRD, 509 Fullsize Tactical, 509 Midsize Tactical, 509 Compact Tactical, 509 LS Edge, 509 CC Edge XL, 509 CC Edge, 510 MRD, 510 Tactical, 545 MRD, 545 Tactical, FNX 45 Tactical, Five Seven MRD
GLOCK MOS
Mounts with Factory Adapter Plate:
G17 Gen5 MOS, G19 Gen5 MOS, G26 Gen5 MOS, G34 Gen5 MOS, G17 Gen4 MOS, G17 Gen5 MOS, G17L Gen5 MOS, G19 Gen4 MOS, G19 Gen5 MOS, G20 Gen5 MOS, G21 Gen5 MOS, G22 Gen5 MOS, G23 Gen5 MOS, G26 Gen5 MOS, G34 Gen4 MOS, G34 Gen5 MOS, G35 Gen4 MOS, G40 Gen4 MOS, G41 Gen4 MOS, G45 MOS, G47 MOS
H&K
Mounting Plate Required:
Mounting Plate: HK 2020 VP9 V4 MIL / LEO, HK VP9, HK VP9 Match, HK VP9 Tactical OR, HK VP9L OR, HK VP9SK
Mounts with Factory Adapter Plate:
FNX 45 Tactical
PSA
Direct Mount:
Compact Dagger Fastfire Cut
Mounting Plate Required:
Mounting Plate: Compact Dagger RMR Cut Slide
RUGER
Direct Mount:
American Competition
Mounting Plate Required:
Mounting Plate: Max-9
SIG SAUER
Mounting Plate Required:
Mounting Plate: Sig Romeo1 Pro Slides, M17, M18, P320 X-Compact, P320 X-Carry, P320 X-Five Legion, P320 RX
Mounting Plate: P320 X-TEN
Mounting Plate: Sig Romeo1 Slides, P320 RX OR (Romeo1), P320 X-Five OR (Romeo1)
Mounting Plate: P322 Optics Ready
Mounting Plate: P365X, P365XL
Mounting Plate: P226
SMITH & WESSON
Mounts with Factory Adapter Plate:
M&P 2.0 Compact, M&P 2.0 Full Size, M&P CORE
SPRINGFIELD
Mounting Plate Required:
Mounting Plate: Hellcat Optics Ready, Hellcat Pro Optics Ready
Mounting Plate: Echelon Full Size, Echelon Compact
Mounting Plate: XD-M OSP, XD-M Elite OSP, XD Mod.2 OSP, XD Mod.3 OSP
TAURUS
Mounts with Factory Adapter Plate:
G3 Tactical TORO, G3 TORO, G3C TORO
WALTHER
Mounting Plate Required:
Mounting Plate: Walther DEFENSE PDP 2.0, Walther PDP F Series, Walther PDP Pro, Walther PDP Steel Frame
Mounting Plate: Walther Q4 Steel Frame OR, Walther Q4 Tac M1, Walther Q4 Tac M2, Walther Q5 Match M1, Walther Q5 Match M2, Walther Q5 Match Steel Frame Standard, Walther Q5 Match Steel Frame Potential, Walther Q5 Match Steel Frame Standard 10RD
Products available on this page:
- AT3 ARO™ Micro Red Dot Reflex Sight with Optional Riser Mount (Doctor/Venom/Fastfire Footprint) - Low Mount - Mount Type: Low Mount | SKU: AT3-ARO-0
- AT3 ARO™ Micro Red Dot Reflex Sight with Optional Riser Mount (Doctor/Venom/Fastfire Footprint) - Absolute Cowitness - Mount Type: Absolute Cowitness | SKU: AT3-ARO-83