ProMag manufactures effective aftermarket magazines for various popular firearms.This 17-round mag is compatible with Sig P320 9mm pistols. With a body constructed of heat-treated steel you can expect optimum durability and longevity.ProMag Sig Sauer P320 9mm Magazine17 Round CapacityDurable Steel ConstructionCompatible With Sig Sauer P320 9mm PistolsIn addition this magazine has an injection-molded follower and a spring formed from heat-treated chrome silicone wire.Whether you're looking for an effective aftermarket replacement mag or just a spare one to have some extra rounds on standby this product is a great choice. Order your ProMag Sig Sauer P320 9mm magazine online today!Score big savings and fast shipping when you shop our large selection of cheap bulk ammo for sale.Searching for a different model? Save big on all your favorite rifle and pistol ProMag Magazines available online at Ammunition Depot.