Iver Johnson Drum Magazine for Glock Features The Iver Johnson drum magazine holds 50 rounds of 9mm ammunition giving shooters a dramatic increase in capacity compared to standard double stack Glock magazines. It is built specifically for double stack configuration Glock pistols ensuring a proper fit and reliable function with compatible models. Steel and polymer construction combine strength where it matters with reduced overall weight keeping the pistol manageable despite the added bulk of a drum magazine. The black finish keeps the drum s appearance consistent with most factory Glock finishes. Extended range sessions benefit from the drum s high capacity letting shooters fire longer strings without stopping to reload or swap magazines. Its double stack specific design means it will not function in single stack Glock models so fitment should be confirmed before purchase. The combination of steel internals and polymer housing is intended to provide durable repeatable feeding across many range sessions. Shooters who want to dramatically extend their 9mm Glock s capacity for range use will find this drum magazine a straightforward way to do it. Iver Johnson Drum Magazine for Glock Specifications Manufacturer: Iver Johnson Model: Drum Magazine for Glock Caliber: 9mm Capacity: 50 Rounds Material: Steel & Polymer Color: Black Compatible Hosts: Double Stack Glock 9mm Available At: GrabAGun