COB'S
Tools: Hammer&nail or drill or hacksaw
Funnel
Getting the supplies: Co2 casing - Can be bought at any paintball store. Also at walmart. This is what they look like:
Black powder: hunting store or rocket engines.
Fuse: can salvage from fireworks or bought at hobby shop.
Hammer&nail: hardware store.
Construction: Ok take your CO2 case and put it in a vice or something that will hold it in place then take a nail or drill and make the hole at the neck wider. Or if you dont have a drill or hammer use a hacksaw to cut the first 1/4 of an inch off. Put your funnel in the neck and pour the BP (BP stands for black powder) in the funnel until the COB is 4/5's filled. Put a fuse in it that will give you at least 7 seconds delay and glue around the neck. Wait to dry then its ready to go! Congragulaions you made a COB!
NOTES: Whatch out this thorows sharpnel at very high speeds and if it hits you it will hurt!! COB stands for CO2 Bomb