M1 Carbine with suppressor (from Springfield Armory Museum):
I had thought about doing this before actually, and the photo(saw it in a thread somewhere) just made me want to try it more.
I was thinking there are two approaches
1. SBR it and find some heavy ammo that would be subsonic
-But I can't find bullets heavier than 115grains for it
2. Integral it and have it ported like crazy
-I'd have to have someone knowledgeable do the work so it would still cycle
I am torn because 1 would enable me to have higher velocity ammo that could penetrate better, but 2 has the convenience of not having to always load ammo for subsonic.
It would be mostly a paper puncher, but I'd like to think it could serve some practical purpose should I ever need it.
Either way I'd want to put a reproduction paratrooper stock. And if in the near future I could find an M2 trigger pack for a reasonable price, it would be fun as heck.