The Thompson thing just jogged my memory.
In the early 50s, I was about 11...someone gave me a
non-functioning Owen gun....an Australian SMG from WW2. Found on a tip.
Mates and I played soldier all over the neighbourhood. I think I had a US helmet liner.
Other guys had other left-overs.
Even had the police visit, once, regarding my bike which had been stolen.
Cop looked, briefly, at the gun on my lawn.
I guess, today, it might draw some unwelcome gunfire.
If you want to win an argument, it is best to stick to the truth.....or,at least, provable untruths.