This 50-round drum magazine from ProMag is compatible with Glock G20 10mm pistols.The drum housing is constructed of a proprietary DuPont Zytel-based polymer with a blue steel upper magazine tower. The magazine's spring is formed from heat-treated stainless steel wire and has an injection-molded magazine follower.ProMag Glock G20 10mm Drum Magazine50 Round CapacityFits Glock G20 PistolsOrder your ProMag Glock G20 10mm magazine online today!Score big savings and shop our online category of 10mm Ammunition available at Ammunition Depot!