Burris FastFire 3 Red Dot Sight 1x21x15, 8 MOA, Matte Finish with Picatinny Mount

The Burris FastFire 3 red dot sight is a compact, lightweight alternative to full-size optics designed for shooters who prioritize speed and simplicity over magnification. At just 25 grams and measuring 1.8 inches long, this 1x21x15 sight fits where heavier glass won't—whether mounted on a pistol slide, rifle receiver, or shotgun. The unlimited eye relief means no head positioning hassles; acquire your target naturally and move on. The 8 MOA dot strikes a balance between precision and quick target acquisition, making this sight equally at home on a defensive handgun, hunting rifle, or rimfire plinker.

Built to handle abuse, the FastFire 3 pairs a durable stainless steel and anodized aluminum frame with multicoated glass lenses sandwiched for scratch resistance and optical clarity. The sight window opens to 21mm × 15mm, giving you a genuinely wide field of view despite the compact profile. Elevation and windage adjustments run ±3 degrees (190 inches at 100 yards) in 1 MOA increments—solid precision for most shooting applications. A single CR2032 lithium battery powers the LED, and the sight functions reliably from −10°F to +130°F.

The included Picatinny mount makes installation straightforward on any standardized rail. Whether you're setting up a truck-bed predator rifle, a home-defense carbine, or upgrading a competition pistol, the FastFire 3 delivers speed and reliability without bulk or weight penalty.

Key Features

• 1x magnification with 21mm × 15mm sight window for an expansive, unobstructed field of view
• 8 MOA red dot reticle for quick target location and precise shot placement
• Unlimited eye relief—mount on pistols, rifles, or shotguns without concerns for sight distance
• Compact and lightweight (1.8" × 1" × 0.9", 25g) for minimal profile and easy carry
• Stainless steel and anodized aluminum construction rated to withstand 1000+ G's of recoil
• Multicoated glass lenses with scratch-resistant optical coating for bright, clear sight picture
• ±3 degree (190 MOA at 100 yards) adjustment range in 1 MOA clicks
• Parallax-free at approximately 50 yards and beyond
• Picatinny mount included for quick installation on standard rails
• Operates −10°F to +130°F; single CR2032 battery included

Specifications

Frequently Asked Questions

Can I mount the FastFire 3 on a pistol and a rifle?

Yes. The unlimited eye relief and included Picatinny mount make the FastFire 3 equally suitable for slide-mounted pistol use, rifle receivers, shotgun rails, and other platforms with standard picatinny sight cuts. The compact 1.8-inch length and 25-gram weight add minimal bulk to any platform.

What battery does the FastFire 3 use, and how long does it last?

The sight uses a single CR2032 lithium battery, which is included. The battery powers the 8 MOA LED red dot. Battery life depends on brightness settings and usage; no specific runtime is provided in the documentation.

How precise is the FastFire 3 for shooting?

Adjustments are made in 1 MOA increments with a total range of ±3 degrees (190 inches at 100 yards) for both elevation and windage. The 8 MOA dot itself is subtended, meaning it covers 8 inches at 100 yards. The sight is parallax-free at approximately 50 yards, making it accurate enough for hunting, defensive, and recreational shooting. For extreme long-range precision, a magnified scope would be preferable.

Will this sight work in cold or hot weather?

The FastFire 3 operates reliably between −10°F and +130°F, covering most hunting and shooting conditions. The CR2032 lithium battery is rated for the same temperature range, so outdoor use in moderate seasons is no problem.