The Burris FastFire II red-dot sight "simplifies the act of aiming, eliminating the need to focus on and align the front sight, rear sight and target," according to the company.

The FastFire II is small, mounts low, and weighs only 1.6 ounces. Operators of high power semi-autos, slug guns, shotguns and high-power rifles mount the unit to their weapon's slide.

The unit's precision lenses are polished to "exacting geometries to virtually eliminate parallax and to provide a very clear crisp sight picture," according to Burris.

Also, the unit is fully windage and elevation adjustable and lockable. It features both an on/off switch and a light sensor that automatically adjusts the dot's brightness to the available light. The included plastic hood covers the light sensor and puts the unit in sleep mode when the on/off switch is set to "on."

FastFire is powered by a lithium CR2032 battery, which is commonly available and long lasting because of the highly efficient electronics and a battery-saver mode. A battery can last as long as five years.

The Picatinny mount allows mounting on just about any rifle. Special bases are available for the most common firearms.

The unit is waterproof, according to the company's product description.