Sig Sauer factory replacement barrels are designed to ensure the accuracy and longevity of your Sig Sauer firearm. The barrels are specially heat-treated for toughness and durability. This barrel features a threaded muzzle to accept a suppressor. Thread protector is included. It is not uncommon for barrels to need fitting; a gunsmith is recommended for installation. FeaturesThreaded Barrel with thread protectorEnsure accuracy and longevityHeat-treated for toughness and durability