ProMag Industries Magazine, 22 LR, 10 Rounds, Fits Mossberg 702 Plinkster, Steel, Blued Finish MOS-01 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.