[1] The Deer gun was made of cast aluminium, with the receiver formed into a cylinder at the top of the weapon.

The striker protruded from the rear of the receiver and was cocked in order to fire, and a plastic clip was placed there to prevent an accidental discharge, as the Deer gun had no mechanical safety.

The grip had raised checkering, was hollow, and had space for three 9mm rounds and a rod for clearing the barrel of spent cases.

The Deer gun lacked any marking identifying the manufacturer or user, in order to prevent tracing the weapons, and all were delivered in unmarked polystyrene boxes with three 9mm rounds and a series of pictures depicting the operation of the gun.

The gun was fired by removing the plastic clip, placing it on the barrel where it would become the sight, and pulling the trigger.