I decided to mod gabhoots pistol because it was so awesome. If gabhoot doesn't want me to post me a comment and I will delete this. I wanted to post a simple pistol with style, so here it is. Please comment, rate, and check out my other instructables.
Step 1: The Handle
This is the handle, as the name implies.
Step 2: The Body
Again, the name says it all.
Step 3: Putting It All Together
Follow the pics.
Step 4: Rubber Band, Decorations, and Firing
The decorations are optional.
Step 5: You're Done!
Have fun with your new knex pistol!