ProMag TAUA2: This 20-round extended magazine for the PT-92 pistol in 9mm is constructed from heat-treated blued-steel, with a follower, lock-plate, and base-plate molded from a proprietary DuPont Zytel based black polymer and using a spring wound from chrome-silicon wire and heat-treated for strength and reliability. The magazine has an overall length of 6.5" with a molded sleeve to fill the gap between the bottom of the grip-frame and the magazine base-plate.