So, I got inspired by Blue Mullet's bolt action rifle to build a lever action rubberband gun.
This is the result of it: a lever action gun, with somewhat of an assault rifle look.
I hope you like it, and tell me what you think in the comments!
When starting the gun, I found out that using that mechanism would make the gun very long, with the lever quite a distance away from the grip.
Instead, I settled on a hammer and lever combination. The lever pushes the hammer back, making the ratchet spin until it hits the trigger. This allowed a pretty compact mechanism, thus lowering the length needed for the gun.
It's still somewhat long, but the stock isn't needed at all. It's just there for comfort, and a bit for the overall looks of the gun.