The ProMag Springfield Armory Echelon drum magazine is expertly crafted from rugged DuPont Zytel polymer, providing a lightweight yet highly durable construction that resists impact and wear. Its heat-treated stainless steel feed tower enhances structural integrity, ensuring reliable cycling even in high capacity use. Equipped with a precision molded anti tilt follower and a high tensile chrome silicon wire spring, this drum magazine delivers smooth, consistent feeding while minimizing the risk of malfunctions. The ergonomic design allows for easy handling and loading, while the sleek black polymer finish provides superior resistance to environmental factors and everyday wear. Extended 50-round drum magazine for uninterrupted performance Compatible with Springfield Armory Echelon 9mm pistols Engineered with a rugged DuPont Zytel polymer blend, ensuring superior structural integrity, chemical resistance and long-lasting performance Durable blue steel upper magazine tower for enhanced strength and reliability Precision-molded for smooth, reliable feeding, reducing friction and ensuring consistent round stacking The magazine spring is crafted from heat-treated stainless steel for enhanced durability and performance Proudly made in the USA for superior quality and craftsmanship