Well Mercy, I don't fire off a ton of rounds at a time out of my AR. That Tommy gun, to me anyway, is going to be pretty much a "plaything" to shoot a ton of ammo at once. From the 2 or 3 that I've seen they aren't very accurate so therefore not that efficient for hunting. You are probably right being that Aluminium is a better heat sink and all. And .45acp (I am assuming that the Tommy he is looking at is in .45acp) isn't that big on recoil so that's not that much of an issue. It's just a head thing I guess. I just prefer the strongest stuff I can have between my face and an explosive reaction a couple of inches from it