Crack would be much cheaper.
For the WWII guys I'm not sure you're an addict until you have owned at least one of the great gas classics:
Kar98, M1 Garand, or M3A1 Grease gun. Unless of course you build your own Garand...
When the elephants fight, it is bad for the grass. When the elephants make love, it is also bad for the grass.