There are groups whos whole MO is advocacy for exactly these types of gun owners, places like the SRA if you've ever heard of them. I won't claim they're massive, but they organize. Since trans folk suffer some of the highest rates of 'random' violence, and Trans POCs have the absolute highest rate of 'random' violence against them, they focus big on those group in addition to any group made to feel othered by 'traditional' gun culture.