The NRA is a sportsmen's organization that advocates for the rights of hunters. Historically the NRA has been for gun control, having helped draft the ban on fully automatic weapons in the 1980's.
I will be charitable, and assume you are misinformed. Otherwise, you're either talking out of your ass, or just plain knowingly lying.
The NRA was incorporated after the end of the Civil War by former Union general officers to improve the general level of marksmanship among the population--because, as Ambrose Burnside put it, "Out of ten soldiers who are perfect in drill and the manual of arms, only one knows the purpose of the sights on his gun or can hit the broad side of a barn." It's mission is TRAINING the same and effective use of firearms. Hunting had exactly nothing to do with the purpose of the organization--though, of course, the NRA DOES support hunting, since it is one of the shooting sports.
As for your comment about the 1986 ban on machine guns, the NRA most certainly did NOT help draft that legislation. The ban was attached to legislation that the NRA DID help draft, the Firearms Owners Protection Act, which undid some of the worst parts of the Gun Control Act of 1968. After the amendment was adopted, the thinking was that the ban on machine guns, while not desirable, was worth getting the rest of the bill enacted into law.