Everywhere I have seen such adapters it says only to be used with flares. I think they are aluminum. You didn't link exactly what you are talking about though.
$0 of an NRA membership goes to legislative action or court battles. Not a dime. Only money contributed to the NRA-ILA or NRA-PVF.
Of course, you could just donate to the Second Amendment Foundation
I was feeling pretty good, then I looked around and realized I am not swimming or on fire.