My Uncle, Dad an I used to have those Tommy Guns an watched the Untouchables....back in the late 50’s....awesome fun !
My favorite uncle - who was in the Army Reserve - bought me the Dick Tracy version of this cap gun, and I quickly "de-Dicked"* it so it would look more like a military Thompson. It turned out to be a roll-cap hog and was not particularly rugged, but it was about as state-of-the-art as any cap gun in town while it lasted... one of my most remembered childhood toys.
Mr. niteowl77
*This sounds much worse than the actual procedure, which was simply label removal.