I've done exactly what solarisjock was talking about, just use old AEG/LPEG/pistol springs, 1.5inch PVC pipe, a few nails to act as a stopper for the spring, 2 screws in the top as a stopper for the PVC end cap I used as the washer that held the bb's for launching, and make a nail as the trigger, just tied off to a string on a tree across the path. These aren't the strongest, but you can also use the crappiest bb's ever with no issues, because you're just giving the target a little shower of bb's. Simply lube the nail that acts as the trigger up a bit to help ease it out of the hole (that sounds bad) where it keeps the end cap compressed. to load these I jst used a piece of .5 inch CPVC pipe about 8 inches long to compress the end cap and springs, then placed the nail in the (for lack of a better term) trigger hole, then tied the whole thing off between 2 trees. I had the trip mine itself screwed on to a tree using 90 degree mounting brackets and had the string set using those screws that look like question marks (eyelets or something like that) so that when the trap was trigger, the string would be pulled in such a manner that the trap's muzzle would be pointed right where the string owuld be tripped. Kinda hard to explain, actually.
Here's a short video. I don't have the trap anymore though, someone removed it from the tree I had it set to sometime in the last 2 months. Not the greatest video, but you'll get the gist.
Here's a short video. I don't have the trap anymore though, someone removed it from the tree I had it set to sometime in the last 2 months. Not the greatest video, but you'll get the gist.
