This 50-round drum magazine from ProMag is compatible with Glock G43X and G48 9mm pistols.The drum housing is constructed of a proprietary DuPont Zytel-based polymer and has an upper tower with a full-length steel internal insert that's stamped and welded like the factory magazine.In addition the magazine's spring is formed from heat-treated stainless steel wire and has an injection-molded magazine follower.ProMag Glock G43X/G48 9mm Drum Magazine50 Round CapacityCompatible With Glock G43X & G48 9mm PistolsOrder your ProMag Glock 9mm magazine online today!Searching for a different styled magazine? For big savings and fast shipping shop our online inventory of low-priced Pistol Mags for sale.Score big savings when you shop our large selection of cheap 9mm ammo for sale.