I have a recommendation, and it's going to sound scary at first so please read all the way through.
We should convince the firearms industry that Net Neutrality is in their interest. They benefit heavily from an internet presence, and recent actions on Youtube related to demonitizing firearms content have already affected the community.
Firearms related content is absolutely an easy target for ISPs to block and censor.
And if there's anything the firearms industry is good at in the US, it's fighting tooth and nail and using their reps to get things done.
I realize it's an uncomfortable and unlikely alliance, but it could be a powerful one.