Vortex Defender ST 6MOA Red Dot

The Vortex Defender ST 6MOA Red Dot is the all-purpose sight for shooters who need one optic that works everywhere: handguns, shotguns, or offset on a carbine. Whether you are running drills at the range or holding the line during rigorous duty use, the Defender-ST delivers the toughness, accuracy, and adaptability your challenging world demands. It weighs 1.48 ounces and runs 25,000 hours on a single battery.

A 6 MOA dot is a deliberate choice rather than a compromise. Larger dots are faster to find under stress and at speed, which is exactly what a pistol or shotgun optic is for.

What the Vortex Defender ST 6MOA Red Dot Does Best

Speed. The bright red 6 MOA dot draws the eye immediately, which shortens the time between presenting the gun and getting a usable sight picture. On a defensive handgun, on a shotgun where the target is often moving, or offset at 45 degrees on a carbine for close work, that acquisition speed is the whole reason the optic exists.

The DeltaPoint Pro mounting footprint is one of the most widely supported patterns in the industry, so the range of compatible slides, plates, and mounts is enormous. Duty users, competitors, home defenders, and shotgun shooters all fall inside the intended audience. Unlimited eye relief and a parallax free design mean the dot is usable from any head position, which matters when the gun comes up at an odd angle.

Key Features

• 6 MOA bright red dot for fast acquisition under speed and stress
• DeltaPoint Pro mounting footprint for broad slide and mount compatibility
• 25,000 hour battery run time on a common CR2032 cell
• 1.48 ounce weight and a 9.7 mm deck height that keeps the sight low and light
• Unlimited eye relief and parallax free 1x viewing
• Built by Vortex for range drills and rigorous duty use alike

Specifications and What They Mean

Adjustments move in 1 MOA graduations with 40 MOA of travel per rotation, giving 115 MOA of maximum elevation adjustment and 145 MOA of maximum windage adjustment. That is a generous range, and it means the optic can be zeroed on hosts where the mounting plate is not perfectly aligned without running out of correction.

Physical size is where the Vortex Defender ST 6MOA sight earns its place: 1.83 inches long, 1.48 ounces, and a 9.7 mm deck height. Low deck height matters because it determines whether your suppressor height iron sights co-witness properly through the window. The CR2032 battery type is the most available coin cell in existence, so replacements are never a problem.

Mounting, Care, and Practical Use

Confirm your slide or mount uses the DeltaPoint Pro footprint before ordering, and use the correct screws with a proper thread locker torqued to specification. Under-torqued screws walk loose under recoil and take your zero with them, while over-torqued screws strip aluminum. A torque driver is a cheap tool that prevents an expensive problem.

Zero at the distance that matches your use, then confirm at longer ranges to understand your holds. Change the battery on a calendar schedule instead of waiting for it to die, even with 25,000 hours available. Keep the lenses clean with a proper lens cloth, and check mounting screws periodically as part of your normal maintenance.

Dot size deserves one more word. Some shooters chase the smallest dot available on the theory that it is more precise, then struggle to find it under time pressure. The Vortex Defender ST 6MOA Red Dot goes the other direction on purpose, trading a little theoretical precision for a dot you can pick up instantly. On a defensive pistol or a shotgun, that is the correct trade nearly every time.

See our full optics selection for mounts, backup irons, and lights to complete the build. One dot, three platforms, no excuses. Ships direct to your door, no FFL required.