ProMag Industries Drum Magazine, 9MM, 50 Round, Fits Glock 43, Polymer, Black DRM-A14 ProMag magazines are made in the USA and backed by a lifetime guarantee against manufacturer's defects. Magazine springs are precision wound using heat-treated chrome silicon wire and each and every step of the assembly process is checked and double checked in order to maintain the same consistent level of quality. Works with right hand magazine release only.