The US civilian market wants these rifles and will pay for them.
They would be fairly collectible I would think. Wikipedia says 609 soldiers, so wouldn't be many. How many mins are out there with crests on them? Only these I'd guess.
$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.