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.
My favorite Mattel toy gun (never got to own one, just saw it on TV) was the “MMP” which I guess meant Mauser machine pistol. It was a Broomhandle Mauser looking thing with a windup machine gun sound.