How to Make a Mini Spud Gun That Can Shoot Bb Too

I had made this project many months back so i thought to show you too .  

PART-
2 - bottles ( you ll need one with its neck and the other just the cap)
a pen ( it should be more than 6mm in diameter so that if u want u can  insert a bb too)
a barbecue lighter 
a cylinder shape container (it is used as a grip for ur gun)

TOOLS:-
glue gun 
drill or scissor to  make holes 
cutter
 

make a hole in the center of one cap for the pen and then glue it  , in the second cap make two holes 

i used the ignitor from my old spud gun .
to make the grip i made two holes and inside it place the ignitor and hot glued it 

take the cap with two holes and glue it at the bottom of the neck make sure it is air tight
now place the chamber on the grip as shown in the image

place ur spit ball in the pen tube with the help of the refill , leave some space at the bottom or behind the spitball
now ur ammo is ready ,its FIRING!!!!!!!!!!!!!! time  spray some deo in the chamber i used axe it really worked