I know some firearms manufacturers offer some lifetime guarantees. Smith & Wesson offers a lifetime service policy. Sig Suaer offers a lifetime warranty against defects. I don't know the limits of these, so I won't opine on what is and is not covered.
My Taurus Millenium Pro is the same way, it is guaranteed for the life of the firearm (not just the owner).
http://www.taurususa.com/repair-policy.cfm