It's not really surprising. The NRA is singularly interested and focused on selling more guns any way, any time, and to anyone. They don't discriminate between hunters, mass killers, school shooters, general murderers, or peaceful protesters. The maga nuts don't really believe in the 2nd Amendment; they don't even know what it says or what it means.
In the same way the NRA is intense about its focus on selling guns, "the base" is just as intense on any way for them to feel like they are "owning the libs." If they thought they could get that intoxicating feeling by supporting windmills, they would jump on that bandwagon in a New York minute... and not only on 5th Avenue.
What is most surprising is that the cry, "they are coming for your guns" would turn out never to have been from Obama or Biden, but instead the fat slob and pedophile, Cry-Baby-trump and his cronies, Kash Patel, Scott Bessant, Kristi Noem, and Stephen Miller.