These magazines are only for 9mm/38super calibers.
Our new 2011® Magazine is manufactured out of 410 stainless steel, producing a magazine with longer life, greater strength, and better corrosion resistance. STI 2011® magazines are built specifically for all STI 2011® style pistols and frames. These STI 2011® magazines are restricted to a maximum of 15 rounds. All 15 round magazines feature our newly updated Gen 2 Follower and the Dawson Precision® Tactical Advantage Base Pad.