Loosening of gun laws helps drive sales. I know guns are 'legit', but this loosening makes them seem more legit.
Nobody is stupid enough to honestly believe that changing "use of force" to "use or threatened use of force" will prompt the sale of even a single firearm.
Another "hurr I used the Google" post, and another inaccurate article that doesn't support your position.
The article claims that the firearm industry has donated up to $56 million total since 2005, an insignificant sum compared to the $100+ million in annual member dues, which are by far the largest source of funding. And that doesn't even include the personal contributions which make up a significant portion of the rest of the NRA's funding.
The NRA publishes its 990 tax forms. If you want to know how it's funded, read them. Or don't, since you never bother to even read your own sources.