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.