Anyone can offer you a lifetime warranty, but guaranteeing performance takes serious dedication & craftsmanship. If your Leupold riflescope, binocular, or spotting scope doesn't perform, Leupold will repair or replace it for free - whether you're the original owner or not. You don't need proof of ownership or a warranty card, and there's no time limit. Leupold will do this because we believe in superior quality and craftsmanship, and we're confident your Leupold won't let you down!