What is the tompson m1 machine gun?
The Thompson M1 sub-machine gun is one of several improvements on the Thompson line of sub-machine guns. The 1928 model was cocked from the top, had barrel cooling fins, adjustable rear sight, etc., the M1 modification was cocked from the side, had a cheaper to make stamped rear sight, no cooling fins. The M1 was used a lot during WW2 & the Korean war.