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AT3 Tactical ARO Riser Mount - Absolute Cowitness Riser for ARO, Fastfire, Venom Red Dot Sights

AT3 Tactical ARO Absolute Cowitness Cantilever Riser Mount – Fastfire/Venom Compatible

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Lifetime WarrantyOn All AT3 Brand Products

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

This includes AT3 Red Dot Sights, Handguards, Iron 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.

Fast & Free Shipping On orders over $50

You will receive fast, free shipping for all orders over $50

Shipping cost is $7.99 for orders under $50. We ship with UPS or USPS, depending on the item.

Most orders received by 1pm CST ship the same day

You will receive an email with tracking information at the time of shipment. To expedite shipping, we may ship your order from multiple warehouses. Orders placed on weekends, holidays, or after 1pm will ship the following business day.

Optimize the ARO for your AR15 with this Sleek, Minimalist Fastfire Compatible Riser Mount

In the world of open micro reflex sights, the small profile can provide a serious advantage in overall visibility.  With no bulky housing tubes or adjustment dials in the field of vision, mounting a small red dot on an AR pattern rifle makes for a very pleasant shooting experience.  The AT3 ARO Absolute Cowitness mount pushes the optic further forward on your rifle, and raises the ARO red dot sight to absolute cowitness height with backup iron sights.  This enables use with any of our AT3 magnifiers, and many other accessories.

This riser can also be used for for your Fastfire, Venom, or Docter red dot sights.

Red dot sight is not included.


  • Mounts on any Picatinny rail
  • Fastfire Compatible Mounting Pattern
  • Machined from aircraft aluminum with black anodizing
  • Weight: 1.1 oz
  • Includes Allen wrench
  • Backed by the AT3 Lifetime Warranty

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Customer Reviews

Based on 1 review

With the red dot on the firearm along with Magpul flip-ups, the sights co-witness. Great mount for the price!