Yes, I know that its a VERY simple block trigger - so please no comments saying "its not a true trigger!!"
It generally works best with around 4/5 rubber bands, and shoots anything up to (and including) yellow rods.
The Black peice that is at the front of the gun is the only supposedly "rare" part, and probably won't be avalible in a newbie set of K'nex. It can be replace with a beige peice, but it's less accurate.
Step 1: The Parts List!
3 Red Rods
1 Blue Rod
5 Orange Connectors
1 Black Connector (unknown description)
13 Grey Connectors
1 Beige Connector
up to 8 rubber bands
Several bits of ammo (the white rods are best)
Step 2: The Rubber-band holder, exit barrel and trigger
Secondly, add 8 grey connectors to the red rod, and afterwards, slide an orange connector onto a the rod, and add the blue rod to 1 end of it. (Picture 2)
Step 3: Ram-Rod and Holder
Secondly, you must make the Ram-Rod itself - the Ram-Rod is made up of a Red rod, with a beige connector, followed by an orange connector on the end. Don't add this to the barrel quite yet, though. (Picture 2)
Step 4: The Support Rod
The Support Rod is very basically a Red rod with 2 upright orange connectors