Bigger and better version coming soon! more stretch and greater ammo capacity
Remixed rubber band gun.
This is the most reliable and simplest to print rubber band gun available. The other designs that use rotating wheels and sears are unreliable and often no more than 3-4 rubber bands can be loaded and fired reliably
A few performance tweaks and visual styling. Grip Panels and beaver tail to stop trigger mechanism from hitting the webbing of your thumb (ouch).
Snap together design, studs press into matching holes, no glue necessary.
Printed and tested
Printing on Kapton tape and using some water based glue stick is a good way to get maximum build platform adhesion and stop warping.
Clean up parts as necessary.
Take the the bottom part and place it down on a firm surface with the studs sticking up.
Take the middle part and place it over the bottom part lining up the holes with the studs and press down firmly. A small craft hammer can help press down the parts.
Take the trigger and place it in the recess of the parts you have assembled. Using a small rubber band place it in the cut out formed by the middle and trigger parts.
Tip: A larger rubber band can be twisted and folded to form a smaller loop.
Take the top part line up the stud and hole and press down onto the assembly.
take the bottom grip panel and place it under the assembly lining up the studs with the holes in the grip. Then take the top grip panel and press it down firmly over the studs and down onto the assembly.
Tip: the grip panels should have a very tight fit and may need a small craft hammer to completely seat, and hold the gun together.
Ready to fire
take three rubber bands (the small kind used for bundling money work best) and load them one at a time, looping them over the cutout on the end of the barrel and then secure them over the tangs on the back of the gun near the grip. one on top of the other.
Point and shoot.
each pull of the trigger will shoot a rubber band and move the rubber bands below up read to fire.
Designed in Fusion360
I took the original design and imported it into fusion 360 and then made new drawings from the imported STL's I was then able to rebuild the gun making the changes I wanted.
The gun is small enough to fit on a 150x150mm build table, but not to small to be held by a large hand. If you have a larger printer you could scale the X and Y axes to print a large gun.