This is the result of my attempt to make an "inexpensive" (uses few parts) semi-auto knex rbg. (rubberband gun) I got kind of tired of finding Knex rbg guns that are great but take a gazillion parts to make. In addition, it doesn't look too bad, either, being somewhat reminiscent of an M1A3 "Grease gun". You are welcome to offer ideas and/or constructive criticism. Please let me know how you like it. :D
Step 1: Photo of parts needed.
Honestly, I don't think I really need to list out all of the parts. A picture's worth a thousand words anyway. :P
Step 2: Making the handle/ grip
No description really needed, I think.
Step 3: Now, the barrel...
Six "grey" spacers, (or 18 blue ones, six to a side) 3 to a rod, and four black y connectors. Note: The connectors (the y ones...) don't have to be y connectors, they can be just about any other connector you have on hand that'll fit... however, I find the y ones to be the best.
Step 4: Then, you build...
This green and yellow bit, which gives structural support to the barrel, and keeps the end part of the barrel (the purple and blue piece, w/ the yellow piece and rod) from sliding towards the trigger due to the force of the rubber band on the barrel (end). Attach the blue and purple bit to the two grey rods of the barrel, and connect the two green and the one yellow rods to the purple connector already on the two grey rods. (hereafter referred to as the barrel).
Step 5: Attaching the Handle to the barrel
Now, you're going to make the handgrip that goes on the barrel. Just follow the pictures.... BTW, the deconstruction of the barrel support is to make it easier to put the yellow connector piece on the barrel...