Experience unrivaled reliability with the ProMag Industries DRM-A111 50 Round Drum Magazine, designed for high performance and durability in the field. Manufactured in the USA, this magazine features advanced engineering and a lifetime guarantee against defects, ensuring you get the quality and performance needed for your firearm. DuPont Zytel Polymer Construction for enhanced durability Heat treated Stainless Steel Internal Spring for consistent feeding Injection Molded Polymer Follower for smooth operation Aggressive Texturing for Positive Grip in any condition 50 Round Drum Magazine capacity for extended shooting sessions Choose ProMag for reliability and unmatched performance on every shot.