It was/is a great weapon and had a variety of clips. Bonnie and Clyde had an affection for the "round" clip which can be seen in a lot of gangster movies. Machine Gun Kelly had an affinity for it as well.
BTW - We used to refer to Vic Morrow's character on Combat as Sgt. Scar-tissue. Seems he got a Purple Heart injury every episode.
I remember very little about the show other than the sets you see at Universal every time relatives from out of town demand you take them there. Har