Ron, not a correction but an addition.
After WWII Dad transferred from the Armed Guard into regular Navy and stationed at Fort Schuyler the Bronx NY. The soon to be New York State Merchant Marine Academy (now SUNY Maritime College). I can tell you Dad had a Navy issue Tommy Gun as part of his inventory. It is my understanding that just the presence got Dad out of a jam in Brooklyn one night in the late 1940's.