Burris AR-F3 FastFire Red Dot Sight 1x21x15 Matte, 3 MOA Dot, w/ AR-F3 Mount (Red)

The Burris AR-F3 FastFire red dot sight is a compact, rugged optic built for AR and carbine shooters who want a straightforward aiming solution that's ready to run right out of the box. This 1x21x15 sight pairs fast target acquisition with a clean 3 MOA red dot reticle—fine enough for precision work at distance, bold enough to pick up instantly in dynamic shooting. It's equally at home as your primary sight on a flat-top receiver or working alongside iron sights as a co-witness, giving you flexibility to build the setup that fits your rifle and your mission.

The AR-F3 mount included with this sight is engineered specifically for flat-top ARs, positioning the optic at the ideal height for both standalone duty and co-witness alignment with standard iron sights. Metal wings guard the lens turrets from dings and impacts—the kind of real-world abuse that happens in the truck bed or at a training course. A compartment in the base stores a spare battery so you're never caught short in the field. The sight runs on a single CR1632 battery and features automatic brightness adjustment via manual push-button, adapting to changing light without fuss.

Built with multi-coated glass, shock and waterproof construction, and MOA windage and elevation adjustments, the AR-F3 delivers the durability you expect from Burris. The unlimited eye relief means you can shoot comfortably from any consistent cheek weld, and the whole package weighs just 4.6 ounces—light enough that it won't slow you down, tough enough to earn its place on a working rifle.

Key Features

• Integrated AR-F3 tactical mount—optimizes sight height for standalone use or co-witness with iron sights
• 3 MOA red dot reticle for fast target pickup and precision aim
• Protective metal lens wings shield optic from impact and unintentional damage
• Automatic brightness adjustment via push-button control
• Built-in spare battery compartment (CR1632)
• Fits any Weaver or Picatinny-style rail
• Shock and waterproof construction
• Multi-coated optics for clarity in varied light
• Unlimited eye relief for flexible shooting position
• MOA adjustments for windage and elevation

Specifications

Frequently Asked Questions

Will this red dot work on my AR platform rifle?

Yes. The included AR-F3 tactical mount fits any flat-top receiver with a Weaver or Picatinny rail. The mount is designed to position the FastFire at the correct height for use as your primary sight or as a co-witness with standard iron sights.

Can I use this sight with iron sights at the same time?

Absolutely. The AR-F3 mount positions the optic at a height that allows it to co-witness with iron sights, so you can run both and have a backup aiming reference if needed.

What battery does it use, and is one included?

The FastFire uses a CR1632 battery. The sight includes a compartment in the mount base for storage of a spare battery—keep one on hand for extended range sessions or field use.

What does the 3 MOA dot mean for my shooting?

A 3 MOA dot is a good middle ground for AR shooting: small enough to provide precision aim at distance, large enough to acquire quickly at closer range. MOA (minute of angle) is a standard angular measurement in firearms; 3 MOA subtends about 3 inches at 100 yards.