This is a knex gatling gun that I built and is very easy to build and does not take very many pieces. It has 8 barrels and shoots about 10-20 feet which is not that great but has a rate of fire of about 8 every one or two seconds. It is not hand held so there fore does not really have a true trigger but to fire all you do is push a lever down. it takes about 30 or 40 seconds to load 8 yellow rods. This is my first Instructable so i am open to any criticism.