People of the Gun will just have to go underground. Which will have exactly the opposite effect of what the fascist Left intended.
Tell e-Bay to go to hell!
Meanwhile: Videos: How to Bumpfire Effectively without a Bumpfire Stock! Turn UP your sound!
https://www.youtube.com/watch?v=GIC8SMttjjo
https://www.youtube.com/watch?v=-9fD_BX-afo
No need for a Bumpfire stock. Amazingly fun! Accuracy is naturally compromised, though. Short handgun cartridges have the highest cyclic rate, since less bolt travel is needed.
Bumpfiring is 100% legal, and safe in a properly maintained modern sporting rifle. Some gun ranges do not like it, though, because they feel you dont have adequate control of the firearm. I am sure that could well be the case of you bumpfired a cartridge anywhere from 7.62 NATO (.308 Winchester) on up.