Terms and Agreements:
Any pain inflicted by this "gun" or by your own idiocy while attempting to build the "gun" is not my fault. Deciding to shoot your friend/your toy/your pet/yourself is your decision and your decision alone, though there is always the influence of others. I cannot and will not accept responsibility for your actions, unless I, in any way, shape, or form influenced you directly within a distance of 10 yards (9.144 meters) of you to shoot your friend/your toy/your pet/yourself, etc.This is not a toy. This is a potentially lethal weapon.
This "gun" is built from two parts: the magazine/feed and the barrel (ram included). A couple of things you will notice about this "gun" are that it has no stopper/blocker/whatever the thing is called that stops the ram; it jams readily if not fired correctly (and if you just aren't lucky, but it is easily unjammed); by shotgun I mean 2 bullets at a time (you will realize how annoying this turns out to be later); and, finally and most importantly, the magazine is detachable (meaning you can remove it and attach a fresh one instead of having to constantly reload!!! OMGZORZ!!!!).
Note: Any list of required pieces is the list of pieces I used to build my version of the "gun." Certain pieces can be exchanged for others.
Special Thanks to: (your name here), an actual Instructables username, for the amazing magazine design. You will notice that I modified it slightly.
Step 1: Constructing the Barrel and Ram
1 black rod
1 tan clip connector
1 red connector
1 orange connector
2 yellow rods
1 red rod
8 orange connectors
7 red connectors
2 grey connectors
1 white connector
The ram is self explanatory.
For the barrel, just attach the many pieces onto the single red rod.
Please excuse the blurry pictures.