First you need to roll a paper tube about the size of your pinkie finger.
Step 2: Step 2
Take the tube and cut it in half, then cut the half in half. You should end up with fourths.
Step 3: Step 3
take one tube ang cut an inch off it. then tape it on top of another tube. take a seperate tube and cut it in half. take one half then cut that in half longways. if you get cofused just look at the picture.
that half and make it a square. take that one half we cut and pit thet in there. tape the sqare to the bottom of the gun. that will be the handle. take a piece of scrap paper and tape it to the bottom of the handle like the picture.
if you want to make a bullet, search"papper gun bullet" on instructibls to find out.