ya, we were morons about that stuff too.
1. large firecrackers (not m-80's just the larger legal ones) covered in wax for the frag effect (felt alot like being punched if hit with a large chunk up-close)
2. 'bazooka'- 4" pvc pipe with the rocked launch rail set up inside, use the fireworks rockets that where about the size of the small models, dump the display and load with custom payloads, also remove the fuse and use rocket ignitors and a 9v battery for precise firing (not very accurate but lots of fun)
3. trip wires set to electronicly ignite one bottle rocket (stick removed), fired into a metal tube filled with many others also stick removed. the effect was sorta rocket propelled claymore. the first rocket lights all the others firing them for quit an effect.
4. all this with bb/pellet guns too (including one .22cal air riffle with a very spendy scope['borrowed' from my friends father], and an 'm-19' (full auto bb-gun, used freon as propelent, add says 3k rpm, didn't seem that fast though)
like I said we were fairly stupid looking back. these 'wars' went on for years in the woods, until one of us lost the proverbial eye. he still has the bb loged against his optic nerve restricting half the vision in his right eye. (who the hell thought mom would be right about that 'gonna lose an eye thing')
was pretty scary for awhile there. found out first hand that the county sherrif looks at a bb-gun wound as a gunshot wound. and I felt fairly stupid as they looked at our 'arsenal' and ask us "what the hell were you thinking"
as my friend was still getting checked out and everybody else bailed (so it was just me taking him for help), leaving me to come up with an explaination. the best I could come up with was "it seemed like the thing to do at the time"