Lego NXT Machine Gun

This is a gun made from the Lego NXT robotics set, but it is my own creation.  It is built so that the clip can be moved to fire either straight forward or around a corner.  It is best used mounted.

Materials: Lego NXT kit (I do not know the specifics because I did not know what parts I was going to use beforehand).

Also this is difficult to explain so please use the images to supplement the explanations.

Step 1 Create Firing Arm

Gather the materials shown and attach the arm to the motor with the black stick and a gray cylinder.  Then attach the motor to the NXT device using two or three black connectors.