The SRA is the Socialist Rifle Association. It started out as a group of all flavors of leftists (anarchists, MLs, demsocs and everything in between) working together to create a positive gun culture for leftism and to train people to defend their communities and themselves during the rise of the alt-right and Donald Trump-style fascism in the States.
However, many branches of the PSL (Party for Socialism and Liberation, a strongly ML political party in the States) decided that the SRA was the perfect vehicle for them and so instructed their members who were also members of the SRA to do everything they could to push out the anarchists and demsocs. Now it is just another branch of the PSL.
I'm not American myself and this was just explained by a few American friends of mine who were formerly in the SRA and even had leadership roles in their chapters; one was a demsoc and two were anarchists. In my own country there are almost no MLs; they came to power back in the 60s and 70s as part of our national liberation but then they just ended up being power hungry, as all MLs eventually become (or were in the first place). Nobody has faith in them anymore so anybody who is leftist is pretty much anarchist or at least demsoc.
And anybody who praises the government of North Korea has absolutely zero moral high ground on which to stand
I'm not one of these guys masturbating over my dream revolution or anything, but armed minorities are harder to oppress, and are less tempting targets for individual or group violence.
I'm a queer guy in Portland. There are violent extremists in my town who want to kill me, and are organizing and rallying. I've seen them in the streets, and they've attacked people and places I care about because they know that the left wing is broadly non-violent, and that cops are on their side.
Looking at the political climate in the US, I don't think it's too unreasonable of a reaction to buy a gun and learn to defend yourself, just in case.