Gun control only really became a thing once Black people started arming themselves.
Negative. Gun Control in the United States predates the founding of the country and it was both racist and classist from the very outset. As documented in that link Gun Control laws have been around for over 200 years and were instituted against Blacks but also against the Irish, the Chinese, and Native Americans.
Your comment is based on The Mulford Act, a stupid and racist piece of California legislation passed with bi-partisan effort and signed by then Governor Ronald Reagan in response to publicly armed Black Panthers. It wasn't even close the first serious gun control law to get passed.
For instance Mulford was modeled on The Sullivan Act enacted by New York State in 1911. It intentionally targeted Italian immigrants, another distinct minority at the time.
This country has ALWAYS enacted Gun Control in response to racial and class elements.