An older cousin of my friend in high school operated a D9 Cat in Vietnam and was issued an M3A1. Got his one and only kill with it during an ambush on a road when a VC ran around the truck he was taking cover behind and he "greased" him....
Uncle used a Thompson to good effect in Europe, '44-'45, he seemed to think highly of it. Can't recall him mentioning the M3.
Gone 20 years, I do miss him.
'Four legs good, two legs baaaad." ---------------------------------------------- "Jimmy, some of it's magic, Some of it's tragic, But I had a good life all the way." (Jimmy Buffett)