mmm, baseball bats are effective. i had a mate who had a steel one and welded a few 9" nails onto it... he keeps it by his front door!!!
those vids are pretty cool! i dont know whether thats actually depleted uranium in that rocket or not.
as for me, i just get crackers and marbles and some iron pipe with a cap on one end!!! its good for shooting stuff with provided u dont mind having 10 goes at the long end of close range to hit something!!! but fun all the same!