ProMag magazines blend the best of traditional craftsmanship and modern manufacturing techniques. They incorporate traditional methods such as stamping and welding of heat-treated high carbon steel, alongside cutting-edge precision injection molding using Mil-Spec polymer compounds. Each ProMag magazine is backed by a lifetime guarantee against manufacturer's defects, ensuring exceptional quality and reliability. The ProMag drum magazine exemplifies this commitment to excellence. Constructed from DuPont Zytel-based polymer, it features an upper tower with a full-length steel internal insert that is meticulously stamped and welded, mirroring the precision and durability of factory-made magazines. This design guarantees robust performance and longevity, making it an essential choice for demanding shooting applications.