This is why you can't buy ANY semi automatic weapons
You're just talking supply and demand. Those will be available again when the suppliers catch up with inventory demand.
Notice you can't buy any FULLY automatic weapons? (Relics hardly count.) they will follow that path: squeeze suppliers until it is legally and economically infeasable to buy any weapon.
Unless they resurrect last Congress' (110th) HR 1022, and just improve it a little and ban them from future sale. (HR 1022) would have banned most all of them. HR