The government can (arguably unconstitutionally) take away those rights after due process. KYC doesn't involve even probable cause a crime has occured.

Felon in possession laws are also laughably stupid and a horrible example of government tyranny. Someone who say illegally harvested or transported a lobster or had pot at the wrong time in the wrong state isn't less deserving of defending his family than the guy with a misdemeanor for DUI. I applaud any felon who continues to carry, knowing if they otherwise carry themselves honorably they are extremely unlikely to be caught conceal carrying. Thankfully projects like the fgc-9 3d-printed gun make it effectively impossible to stop felons from acquiring firearms and restores their 2nd amendment rights.

I was talking in the context of private entities. Though the government may be able to deprive convicted felons of certain rights (idk the details) it can’t deprive you of Constitutional rights (in theory). For the government to generally deprive someone of their rights it would be inherently unconstitutional. Obviously they can and do literally do this to people via edge cases they can’t do so legally - it would be a contradiction.