Pro Mag Industries AR-15 SMG Magazine Features The ProMag AR-15 SMG magazine feeds 9mm Luger ammunition through AR-15 pattern 9mm SMG carbines giving shooters a 32-round reserve for extended range sessions or range training. Its hybrid construction uses a stamped steel upper magazine section finished in black oxide for corrosion resistance and wear durability over repeated loading cycles. The lower housing is overmolded with DuPont Zytel based polymer which keeps the magazine lighter than an all-steel design while still protecting the internal components. This combination of materials is built to withstand the abuse of regular range use and field carry. An injection molded magazine follower helps maintain smooth consistent feeding as rounds are depleted from the stack. The magazine spring is formed from heat treated chrome silicon wire a material chosen for its ability to retain tension and resist fatigue across thousands of loading and unloading cycles. Made entirely in the USA this magazine is manufactured to ProMag s standard quality control processes for reliable functioning. The ProMag AR-15 SMG magazine gives 9mm carbine shooters a durable high-capacity option for sale at GrabAGun. Pro Mag Industries AR-15 SMG Magazine Specifications Manufacturer: Pro Mag Industries Model: AR-15 SMG Magazine Caliber: 9mm Luger Capacity: 32 Rounds Compatible Hosts: AR-15/M-16 Material: Stamped Steel / Zytel Polymer Finish: Black Oxide Country of Origin: USA Available At: GrabAGun