Introduction: LEGO Laser Canon.
I came up with this idea messing around with LEGO pieces.Vote for me in the LEGO contest!
Step 1: Gather Pieces.
The 2x4 with a hook you see in the picture is a piece I got from a magnetic LEGO mini figure that I took off. Here's a link to some on amazon already removed. http://www.amazon.com/gp/aw/d/B002U2YG7E
Step 2: Build It!
It's pretty self explanatory.
Step 3: Done!
Go have fun!