[GLI45]

I can't speak for the warranty on Sig or Kimber, but if you're looking for a top quality 1911 with outstanding customer service and a lifetime warranty you should really check out STI. The following is part of STI's answer to a warranty question in the FAQ section of their website:

"We stand behind our products and if you EVER have a problem with an STI, we are going to make sure to take good care of you! The STI warranty covers the product- not the original purchaser so even if you purchase it used, we will still warranty our work."

As the happy owner of a number of their pistols I have always been very impressed with their products and their people.

 

[GLI45]

I think the only thing that voids the warranty is if someone else works on the gun. Obviously if you have a local gunsmith do any kind of customizing or changing out parts STI would probably have an issue, but I can't really blame them for that. While I've not had any serious issues over the years I've always just arranged to drop of a pistol for them to work on when something has come up. (I'm nearby so a drop off isn't a problem.) Their CS guys have been terrific and very concerned with my complete satisfaction.