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.
Specifications
| Features | 50-Round Drum Magazine; Fits Smith & Wesson SD40 .40 S&W Pistol; Magazine Body Constructed of a Proprietary Dupont Zytel Based Polymer; Hybrid Steel Upper Magazine Tower; Injection Molded Magazine Follower; Magazine Spring Formed From Heat Treated Stainless Steel; Made in the U.S.A. |
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