That Should Be "Make-Shift"

There's just no telling what kind of weapon will turn up in Mexico next.

Verbatim:

Mexican police supposedly discovered the powerful weapon (identified by press reports as a Browning .50 caliber machine gun) at a house in northern Sonora state while on routine patrol. It was attached to a make-shit gun turret mounted in the bed of a Ford pick-up truck.

link.

a) It's a movie-gun fer cryin' out loud, and
b) it's attached to a make-shit turret.