That is actually an interesting guess. Technically, such a device (and there are such devices) would be called an "auto-reset", which would automatically reset the trigger after bumpfiring. But, no, this has nothing to do with bump stocks. It is a genuine, registered machine gun.omh » 24 Jun 2022, 8:53 am » wrote: ↑ Strictly a guess, must work relative to a bump stock style of configuration using recoil to when stock moves back forward from actions from springs pushing back against recoil.