ProMag's AR-15 9mm 50rnd Polymer Drum fits 9mm AR-15 carbines that use Glock type 9mm magazines. The drum housing is constructed of a proprietary lightweight DuPont Zytel based polymer and the tower has full length steel internal insert stamped and welded like the factory magazines. The magazine spring is made from heat treated stainless steel. Made in USA.
Capacity: 50 rounds