Bump stocks do not make a semiautomatic rifle more effective for any purpose other than emptying a magazine quickly. They really are not useful for anything other than firing into a crowd since their operation essentially relies on moving the rifle while firing which throws off aim. I don’t see any real sporting use, unless spraying the fire range is a sporting use, or you are going to fire into a herd of buffalo.
I could be wrong.
Kind of stupid to ban a piece of plastic. A rubber band or piece of string can do the same thing
"Sporting use" has nothing to do with the Right to Keep and Bear Arms.
RKBA isn't about "sports", or even about stopping street criminals, although those activities are protected.
RKBA is about killing tyrants.
I have used bump stocks. My buddy had a bunch of ammo to burn.
It was fun burning up his ammo. A sporting use.
I never brought one I prefer hitting what I am shooting at.
I spent some time shooting real machine guns.
Tripod fixed positioned one have real uses.
Sub guns are great house close quarter weapons.
Others not so much.