RE: M1 carbine-good brush gun
Good brush gun for what? Smallish whitetails, but I wouldn't hunt large bodied animals with it, unless there was no other option, like a survival situation. Power? Don't kid yourself, in terms of energy delivered, it compares reasonably closely to a .357 Magnum fired from a carbine, again, best at 50-75 yards. There are better calibers and better firearms for brush.