There are two reasons to remove the nut and look inside: Curiosity and wanting to clean it. The discovery that it is as clean as a whistle inside is the result of both. Having removed it would I "restake it?" absolutely not. Staking is the physical distortion or wrecking of the threads so they don't work anymore. That is fine when you can turn the carbine into another place and they fix it like new for free. We don't and they won't. So use a gob of permatex or some Loktite and let it go at that.