ProMag Magazine for Sig P320 9mm 21-Round Steel Blue

ProMag magazine for the Sig P320 is constructed of high carbon heat-treated steel and TIG-welded for strength. The springs are precision wound using heat-treated chrome silicon wire. Bases and followers are injection molded from polymers selected for their durability. The result is quality, consistency, durability and reliability.FeaturesFits Sig Sauer P320 9mm pistolMagazine body constructed of heat treated steel with black oxide finishInjection molded magazine followerMagazine spring formed from heat treated chrome silicone wire