no they don't, most of their funding comes direct from gun manufacturers. The NRA right upto the mid 70s was entirely about gun safety and animal conservation, since then it is entirely focused on selling more guns. That's not opinion, that is fact.
As for not being an evil group of people, you clearly haven't seen any of Dana Loesch's work for the organisation.
That's not correct at all, the NRA's budget is $433 million, gun companies donated literally a couple of million a year to that.
Can you actually cite where you're getting the source that "most of their funding" comes from gun manufacturers or stop posting basically things you're making up on the fly?