He was handling the carbine carefully.

He headed to the battlefield with an assault rifle.

An electron gun is a device for generating an electron beam.

He picked up the ray gun and fired it at the alien.

The police used a water cannon against the demonstrators.

This story perfectly practices the principle of Chekhov's gun.

He likes to take a walk in the park at dusk.

He entered the forest with a shotgun.

He worked as a rear gunner in a fighter plane.

He received training to handle a heavy machine gun.