Promag S&w Sd40 40s&w 50rd Drm Blk

ProMag magazines are made in the USA and backed by a lifetime guarantee against manufacturers 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.Features :50-Round Drum MagazineFits Smith & Wesson SD40 .40 S&W PistolMagazine Body Constructed of a Proprietary Dupont Zytel Based PolymerHybrid Steel Upper Magazine TowerInjection Molded Magazine FollowerMagazine Spring Formed From Heat Treated Stainless SteelMade in the U.S.A.