I heard or read the drum magazine was easy to break by overwinding it even a little bit. The spring would spring without much effort.
Other than that, it's a cool looking weapon, that's for sure. Be kinda neat to have a replica to hang in the "war room." Was always more partial to the fore stock version, rather than the hand grip...(which looks gangsterish imo.)
First time I saw a full sized version (in a gun shop) I was surprized at the size, around 3 feet long!!! That was one of the long barrel Thompsons.
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If I absolutely needed a full auto sub gun for self defense purposes, I would choose a Mac-10. No larger than a brick and weighs about the same. That way I could carry it around with me.
Les