kool last night i made a really kool simi automatic bb gun with a bic pen clip. wut happens is u take the cap for the pen and cut a hole in the barrel (i use a pen case)then u take the cap u cut off the small end until the bb of choice can easly go through and by bb of choice i mean airsoft or metal bb, then glue or tape it so the small end is in the hole where the hole is (it hase to be over the stick or mechan pencil clicker)then u keep the plug in the back of the pen or clip and u just slide it in the pen case.some inprovements for bb guns the ferther the bb hase to travle the more ferther it will go right i dont know ive ben experamenting with that and thats wut happens with airsoft bbs but only use 1 pen for the barrle and cut the stick or mechan pencle clicker half way but thats only my theiry.im going to post instructions on my gun ideas and right now im trying to make a real clip like the ones in real guns with springs i think ive almost got it figured out ps:srry for the bad spelling