What kind of gun is a chopper?

Question

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Answer 1

I have heard the 1927A1 called a chopper.

The 1927A1 is also known as a Chicago Typewriter or Tommy Gun.

Answer 2

"Chopper" was jargon for the Thompson Submachine gun popular in the Roaring Twenties.

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Answer 3

Chopper is a 1920's term used to describe the TSMG, aka the Thompson Sub Machine Gun. They also called it the Tommy gun and the Chicago Typewriter. Since then it's been used as a general slang term to describe any Sub Machine Gun.

Answer 4

Chopper is a 60's to 70's slang for machine gun in general