These pre-owned Sig Sauer pistols have been Factory Certified after passing the Sig Sauer five point factory certification process. And no certified pre-owned Sig Sauer pistol leaves the factory without the approval of an expert Sig Sauer armorers. Before receiving its factory certified pre-owned status each pistol is stripped, refinished, refitted with original factory parts where needed, cleaned and lubricated, function tested and hand inspected by a certified Sig Sauer armorer. Each factory certified pre-owned Sig Sauer comes with a one year warranty from Sig Sauer.