[solarisjock]

what a buddy on my team did is collect old AEG springs, mounts a washer to the top of it, and sticks the whole thing in a piece of PVC pipe with a stake glued to the side. he then gets a nail which he pushes through a whole in the side to hold the spring loaded washer down. stake the pipe on one side of a trail, while putting a piece of string around the head of the nail and tie it off across the trail. cost is pretty negligible, you can make 5-6 for less then $10 USD.

 

[solarisjock]

hmm, i see i forget the part where it gets armed..... to arm it you compress the spring, then put the nail in to retain the spring. pour some bb's in the top. now it is armed, and when some unsuspecting target walks across the trail and pulls out the nail, a shower of bb's will come flying out of the pipe.

 

[solarisjock]

ahh, im just having an off day today..... i imagine you could add a piece of cloth over the top of the washer and put baby powder in there as well.