Discover the pinnacle of magazine engineering with ProMag. Our magazines blend traditional craftsmanship with advanced manufacturing techniques, incorporating heat-treated high carbon steel stamping and welding, as well as precision injection molding using Mil-Spec polymer compounds. Each ProMag magazine is meticulously designed and backed by a lifetime guarantee against manufacturer's defects, ensuring unparalleled reliability and performance. Introducing the ProMag drum magazine, meticulously crafted from high-impact DuPont Zytel-based polymer. Its upper tower features a full-length steel internal insert, stamped and welded to match the quality of factory magazines. Elevate your shooting experience with ProMag, where innovation meets reliability.