Here is a tiny uzi I made. It does not have a trigger, but has a button. To shoot you have to press the button and it will shoot. If you press the button hard enough it will eject the shell, or the blue rod button. Not the best gun ever, considering it is single shot and has very low range. So here is how to make it.
Step 1: Make It!
Here is how to make it. Pic 1 what you need Pic 2 body Pic 3 handle Pic 4 add ammo Pic 5 add button/shell - Now you are done!