In this order-
Grenade Launcher- say the Gunny on Mail Call with one, I'm hooked.
AK-47- got to offset the Launcher
One of those shot guns with the clip
K-Bar (gifted to me by a generous BOTL)
M2- nothing stops someone like this guy, also saw the Gunny with it.
USMC's Light Assault Vehicle- cuz after all that other stuff, my trusty pickup just seams inadequate.