I recently dealt with both Dan Weaaon and Trijicon on a night sights issue, and the experience left me less than satisfied. I called Dan Wesson and they said I needed to call Trijicon, and when I called Trijicon they said it was Dan Wesson's problem. I finally got Trijicon to issue a RMA and they replaced the sight, but it took forever.
The procedure is:
1- Go to Trijicon's web site and contact their QA department via the form on the site.
2- After they review your message, they will contact you and either decline the issue or issue a RMA.
3- You will have to remove the sights and send them to Trijicon.
4- If they replace the sights, you will have to install them back on your pistol.
Good luck!