Like the title said, I designed and printed this functional NERF gun.
It took me 2 weeks to design it and test it and so far it works great

https://youtu.be/I1ysAEWrXzw

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You can download model here
https://www.myminifactory.com/object...f-weapon-57336

https://www.thingiverse.com/thing:2802316