By the way, I’ve shot a Thompson. In a firefight, I’d rather have my AR-15s.
I’ve fired a “grease gun” on a range. It was fun, but it tended to run away and climb, the tank and M-88 tank recovery crew men had them.
I liked my M-16 better, more accurate, easier to control the few times we fired in auto. Plus it had abayonet!