rubbish. there's no way you can fire a revolver as quickly as a semi automatic.
in any case, the law just needs to be worded correctly. something along the lines of:
- ban all automatic and semi automatic weapons.
- ban all adaptations that allow a gun to be fired like a semi automatic
- make it illegal to manually modify a gun to fire like an automatic or semi automatic
- by <certain date in the future>, all future guns must be fitted with rate limiters so that they cannot be modified to operate as automatics or semi automatics
- make it illegal to remove or modify the rate limiter