Sorry... Did not know this was an old post until after I posted my response.
Doesnt the Night Guard series come with adjustable rear sights? If so and you use lock-tite, you will never be able to adjust it. Once used and it's on there for good. Sounds to me the sight was not tightened properly before shipping. If this is a new purchase, I would take it back and see if they can correct it for you. If you bought it used, you have a lifetime warranty from S&W, and I would contact them to see what they reccomend.
Please keep us up to date on how it was resolved, and good luck.
37 People are murdered every day by the unlawful use of a firearm.
2,191 are saved every day by the lawful use of a firearm.
84,999,989 American gun owners killed no one yesterday.
Last edited by Kemosabe; 01-02-2013 at 03:07 AM.
Reason: Apologized for replying to an old post.