Glock®upped the capacity of its small self-defense guns with the launch of its G43X and G48 pistols, giving users a stagger-stack magazine design loaded with more rounds. Now, Pro Mag is giving those same Glock®owners a chance to have even greater magazine capacity, thanks to the company's drum magazine designed for the guns. This Pro Mag Glock®48/43X Drum Magazine is made using a proprietary type of Zytel-based polymer originally made by DuPont. The housing is made from this material, while the upper feed tower features a carbon-steel lip reinforcement that's overmolded to aid in durability and lubricity. The drum is completed with an injection-molded magazine follower that tops a spring made from heat-treated stainless steel. The Glock®48/43X Polymer Drum Magazine from Pro Mag is designed for use with 9mm cartridges only and features an all-black finish. The drum holds 50 rounds and is made in the USA.