Runaway

Guns used in this Sci-Fi movie:

Detonics Servicemaster/Combatmaster

Used as a service handgun by Tom Selleck and Cynthia Rhodes. The gun has the characteristic Detonics forward mounted rear sight, which was featured on the combat master, but the longer grip frame of a Service master. It should also be noted that there is a line present on the slide where a combat master slide would end, a similar gun can be seen in Terminator 2: Judgement Day)

Ramsay and his new partner head into a cornfield to stop a runaway

Ramsay uses a Detonics in "Runaway"

Ramsay takes control of a suspect who left his child at the mercy of a runaway

Thompson holds a hotel room full of suspects at bay with her service issue detonics

Detonics Combatmaster

In the third act of the film, while trying to protect Jackie Rogers from Luther both officers use compact combat masters as sidearms.

Ramsay gives up his gun to Luther for the second time

Ramsay takes cover from explosive projectiles while patrons of the outdoor cafe wonder why

Custom Police Belt

Today it is very common to see officers carrying semi-automatic handguns, but in 1983 (when the film was shot) most police agencies issued revolvers. These custom belt rigs were way ahead of their time.

Police utility belt

Laser Gun

In one of the films more tense scenes, Ramsay uses a laser gun with a battery pack on his belt to stop a murderous runaway inside a suburban home. It should be noted that Tom Selleck's character only fires this weapon in the film. He never fires his main sidearm, or his compact backup.

Ramsay tests the laser on the ground before entering the home

Ramsay enters the home laser gun at the ready

Ramsay blind fires around a corner before moving into the hallway

Ramsay takes a shot at the armed runaway from under a bed

Ramsay takes a final shot at the runaway from on top of the bed

Unknown snub revolver

This is likely to be a smith and wesson chief's special, but it is never shown well enough to be sure. Johnson uses it to fire at Ramsay after he kicks in the hotel room door, thinking it's Luther come to kill him.

Johnson stops firing, which if this was Luther would have been the end of him

brightest muzzle flash EVER

Ramsey tucks the small revolver into the small of his back, kind of like Magnum PI used to do.

Thompson holds the suspects snub revolver in a very unsafe fashion, while they attempt to put him in the back seat sans handcuffs

Smith & Wesson Model 19

The 2.5"-barrel version is used by a robot (!)

S&W 19 in "Runaway"

Dr. Charles Luther's "smart" missile gun

Though the model info is unknown, the base of the gun is clearly a 1911 style frame. Probably provided by Detonics. The missile-firing pistol used by the villain, Charles Luther (Gene Simmons), in the movie was probably designed by the prop department. Interestingly, the publicity materials for the film, chiefly the poster, showed Tom Selleck holding the gun though he never uses it in the movie. The story alludes to one of the scientists working with Luther being an expert in propulsion & perhaps the supplier of the gun & its ammo. The runaway squad's chief tech officer (Stan Shaw) later calls the mini-rockets "smart bullets."

Luther pulls the missile gun while the officers deal with his target

It looks like it may have been fitted with custom "grooved" grips

Note that the magazine well inside the grip has been capped off by a custom buttplate

Luther about to fire at Johnson in the alley

Luther fires the missile gun. In contrast to current style prop weapons, there is little to no muzzle flash when the gun is fired. You see that little flash inside the barrel? That's it.

Another example of the gun being fired, this time only a small puff of smoke is the tell

The most dramatic flash the gun has in the entire film

The projectiles are all electronic "heat seeking missiles" with a back half made up of solid propellant, making use of valves for directional control. They are able to be programmed to "go after" a specific person using a person's unique heat pattern as a signature.