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The Marshal wrote:Question is, do you get the 12yr warranty on the sites if you don't have Kimber install them?

Not sure about Meprolights, but Trijicons have a 10 year warranty. It also depends on the color of the night sights. The orange sights have a shorter warranty than the green ones. I think it's 5 years on the orange ones.

Kimber machine pressed their sights in so they are very difficult to remove. Sending it back to Kimber for them to install will be your best bet.