The Jerk

The following guns were used in the film The Jerk:

M16A1

The Madman (M. Emmet Walsh) is seen using an M16A1 with a scope and a suppressor to try and take out Navin R. Johnson (Steve Martin). This scene is also briefly glimpsed on a TV set in the film Black Hawk Down.

M16A1 with 20 round magazine - 5.56x45mm. What distinguishes it from the original M16 was the addition of a raised rib around the magazine release button, changing of the forward Receiver pins, and the addition of the forward assist button on the upper receiver.

MAC-10

The Madman is also seen carrying two MAC-10's in his arsenal.

Ingram MAC-10 open bolt submachine gun - .45 ACP

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Colt Python Revolver

The Madman also is seen pulling a Colt Python revolver when he chases Navin.

Colt Python with 6" Barrel - .357 Magnum