If you read lefty historian Howard Zinn's book
People's History, which is a survey of US history thru leftist goggles, there are gun rights angles found in many a struggle that would normally be associated w/ the left. Civil rights for blacks is just one example. There are gun rights angles to be found re American Indians, unions, and others.
This is the history that today's liberals would love to bury and forget. These are not some archaic examples from ancient history. These are things that happened within the last century in America.
https://www.youtube.com/watch?v=XDd64suDz1A