This is a semi automatic pistol. I got the magazine hopper idea from Ednator55. This hopper never jams. This gun shoots about 20-25 feet and can pierce a cardboard box with a sharpened rod.(I used 2 rubber bands in this testing) ENJOY :D
Step 1: Building Body and Trigger.
1.) Build the two objects in the picture.
2.) Top view of upper object.