All the tools you need from my last instructable are used again here.
So, I wanted to make a more budget oriented gun, one perhaps a bit better.
So the dollar store was the first stop, there I got a pen, and a really lame orange dart shooter.
Total cost $2 (actualy I had these things already so it was free for me)
Step 1: Disassemble and Break
Ok, now I worked on a way to attach the pen to the existing barrel, I tried drilling it out but found that the best way was to just break the barrel off.
Step 2: Glue the New Barrel On
Take your pen or marker and extract the barrel....
Glue it on and keep it tight, no air holes.
Step 3: Close It Up and Add a Handle
Put everything back in the gun, and use the hot glue to put the halves back together, use a knife to chop off all the extra glue once it dries.
During testing I found that the tiny orange plunger was VERY hard to grab and cock.
So I drilled two small holes and placed a wire loop in it. Now I have a nice big handle.