K-9

The following weapons were used in the film K-9:

Beretta 92F

Detective Michael Dooley (James Belushi) uses a Beretta 92F with wood grips as his primary weapon in this movie. The wood grips can only be seen when Dooley lays the gun down on a hospital tray table. He incorrectly refers to it as his "revolver" when threatening Jerry Lee to get off the table.

Beretta 92S

In a continuity error, when Dooley lays his gun on the hospital tray table, you can clearly see that the gun has become a 92S instead of a 92F, because it has a rounded trigger guard, unlike the 92F, which has a bigger one for finger support while aiming.

Heckler and Koch MP5A3

During the scene where a man in a helicopter shoots and blows up Dooley's car, a Heckler and Koch MP5A3 can be seen firing at the car.

Smith and Wesson Model 5906

At the end of the movie, Lyman (Kevin Tighe) uses a 9mm Smith and Wesson 5906 in stainless steel. He uses it first to hold Dooley's wife, Tracie (Mel Harris) at gunpoint, and again to shoot Jerry Lee (the dog in the film).

When Dooley says the line "You think this is a Nine Millimeter mistake?", he wasn't kidding. People have said that it is really a 4506, but close examination of freeze frames reveal it's a 9mm 5906.

Smith and Wesson Model 14

Throughout the film, uniformed officers of the San Diego PD can be seen wearing and aiming Smith and Wesson Model 14 revolvers. Contradictions state that the guns are really Model 27s, but examination of the barrel reveals it is really a .38 Model 14.

Smith and Wesson Model 19

Lieutenant Byers carries a 4-inch Smith and Wesson Model 19 in his hip holster. It is never seen out of it's holster.

M16A1

Several M16A1s are seen in the film used by San Diego PD SWAT.