Rubber Band Gun

by Gavilan, published

Rubber Band Gun by Gavilan Jan 1, 2014
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Rubber Band Gun by Gavilan is licensed under the GNU - GPL license.

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This is a semi-automatic rubber band gun I designed for friends and family. I also made a youtube video about it here:


To see more of my work, check out my blog:


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Just printed mine. Going to assemble it tomorrow.

I have some questions about assembly. I understand the 8 screws, and I assume the threaded rod is cut to fit into the trigger holder. My question is the gear- I guess it gets a threaded rod, too, but it seems to just float around left and right.... what keeps it in the center? Do I print two of them and stack them? Does anyone have assembly instructions?

Do I stack the washers, 4 to a side?

Great fun, I remixed it so no screws required.

it would have been nice to have a parts list for the hardware needed

In the video he says 8 1/2 inch #6 screws, 8 #6 washers, #6 thread rod, 2 regular #6 nuts, and 2 #6 lock nuts

Great design! Printing my second one now!!!

May I know what screws did you use for this? as well as what did you to connect the trigger. Thanks

Love the design.
A small suggestion to those printing it, adding two small printed washers on either side of the wheel really improved the performance. I used an M4 to hold the wheel in place so I made two 10mm dia washers, 3mm thick with a 4.5mm hole. One on either side of the wheel and it keeps it nice and centered and also provides a good place for the rubber bands to stack up on and rotate freely.

Also, if anyone wants to make an improved version, a place to store the rubber bands when not in use as well as spares would be awesome. Seems like there could be plenty of room in the handle with some modification.

hi again,
if you have made this in open scad would you share the source with us?

I tried printing it and there is two left handle and no right one! Can you upload the right one?

I just looked over the uploaded files and as far as I can tell [handle_mirrored.stl] is the left one and [handle_fixed.stl] is the right one. What am I missing?

I know, and thats what I printed and they are both left. Even the images show two left. Maybe Im the one missing something.

Great Work and happy new Year from Germany. Thanks for Sharing