“How is he restricted from buying ammo?”
He is not restricted from buying guns, ammo and he can even open carry a rifle or black powder handgun. The ONLY thing no longer do is concealed carry.
Another know nothing author...
He is not going to be able to answer no to question 11b on the ATF 4473.
But why? Simply because of an accusation that has yet to be proven true? Even a person who is busted for DUI keeps their license until convicted in court (which takes a some time to move through the "system".
Is it Texas law that you cannot conceal carry because you have been charged with something not yet proven and not yet convicted for?