ProMag Sig P320 / P250 9mm 21-Round Blue Steel Magazine

This is a ProMag 21-Round Extended Magazine for the SIG P320 and P250 pistols.

This magazine is specifically engineered for use with SIG P320 / P250 with a plus 4 grip extension that allows it to hold 21 rounds of 9mm. The heat-treated steel body features a corrosion-resistant black oxide finish for lasting durability and exceptional reliability in harsh, potentially corrosive environments, while the heat-treated chrome silicon wire internal spring and injection-molded DuPont Zytel polymer follower work together to deliver proper cartridge alignment and smooth, jam-free field performance you can depend on. 

Better yet, this American-made centerfire pistol magazine is backed by a lifetime warranty, promising years of consistent field service you can depend on.