Knex Shotgun Instructions

This is the most powerful gun I have ever made or seen to date. This is extremely dangerous so I am telling you now, You may only build this if you do not shoot in the direction of or at another person. You must also have parental consent to build this if you are under 18. Anyway, this is not a piece consuming model so hopefully many of you can build this(click on the picture below to enlarge it):
















Here are the instructions:


Part 2: