Join me on a magical trip to BS Mountain, where I have all the money in the world and things like tax stamps and wait times don't exist...
To sum it up, machine guns. Specifically, WWII-era machine guns.
The Browning Machine Gun
MP40 (sub-machine gun, still counts!)
Let's throw owning an M60 in there and that completes the dream, for now.
Good equipment will never be a substitute for good training.