ProMag Industries Magazine, Drum, 7.62X39, 50 Rounds, Fits Ruger Mini-30, Polymer Construction, Black DRM-A101 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.