Anyways, onto the gun. It's too flawed to be posted itself but I'm hoping someone can take, modify, and make practical the basic concept of this gun. Basically, it's 5 layers wide, including the magazine so that 3 pieces of ammo fit side by side. The next part is a two for one deal. It's a new (as far as I know) front hooked pin where the bands are set up on a connector in front, creating a sort of charging handle like pin. The body has a gap in the sides to allow the connector to protrude out. The rod then goes into the back of the gun acting as its own pin guide. The connector in front hits all 3 pieces of ammo when fired giving it a shotgun effect as well (though you could just as easily use the pin concept for a single shot weapon too).
Again, my gun isn't built as good as it could be but so far mine fires up to 4 sets of 3 dark grey connectors and white rods. I used connectors because rods don't like to stack nearly as well as connectors do. It's not too durable for the sake of being compact but you could easily make support structures to make sure the gun stays solid. I'm thinking with the new pin, pump action could easily be set up.