So You Want to Contribute?
Ever since around September 2006, K'nex weaponry has occupied Instructables, and has been growing rapidly ever since. If you're having trouble figuring out what to post for your Instructable, take a look here, maybe you'll get a few ideas.
Before contributing to the site, please consider the following:
-The first thing you should do before contributing your first Instructable is that you should skim around the site a little. You should get used to the way the site works and comment a little, get to know some people.
-Check out this guided tour of Instructables to help you get started.
-You should ask around for ideas on how to make a great gun.
-Make some simple guns, and work your way up. A great starter K'nex gun would be KILLERK's K'nex gun.
Step 1: Start building!
Now that you have all your parts sorted out and ready to go, you can start making the gun.
Let's start with the basic mechanisms of any K'nex gun. All K'nex guns have one thing in common, they use rubber bands or springs (or any other objects that have a lot of potential energy) to push or pull a projectile out of a barrel or off of a track. In most guns, a firing pin or plunger is pulled back and blocked by a "block trigger." A block trigger is a mechanism that blocks the firing when pulled back, thus storing a lot of potential energy in the firing pin. When the trigger is pulled, the projectile is shot out of the barrel or off of the track.
Another kind of firing method uses the same principle, but the firing pin itself is shot out of the barrel or off of the track. This method is most commonly used in crossbow designs, but some K'nex crossbows use string rather than rubber bands and depend on the flexible arms for their power.