I agree those are examples of maintaining (often racist) power systems. But what you're providing aren't examples of gun rights, they're examples of gun control

I agree those are examples of maintaining (often racist) power systems. But what you're providing aren't examples of gun rights, they're examples of gun control initiatives -- which are the opposite of gun rights. This extends beyond such obvious examples as the Mulford Act (California's foray into gun control, banning open carry in response to armed protest by Black Panthers). Gun control often focuses on removing access to arms by any poor and disenfranchised groups. So called "Saturday night special" legislation seeks to ban cheap guns, with disproportionate impact in disadvantaged communities. Access to arms has historically been a key element of people maintaining their freedom from government abuse. Your examples of gun control indeed do undermine this freedom. The history of gun control in the US is deeply tainted by racist motivations.