Promag Smith & Wesson 5900 9mm Handgun Magazine Black Polymer 50/rd

ProMag magazines are designed utilizing both traditional stamping and welding of heat-treated high carbon steel and modern precision injection molding of mil-spec polymer compounds. Every ProMag magazine is backed by a lifetime guarantee against manufacturers defects. Made in USA.

• Drum housing constructed of a proprietary DuPont Zytel based polymer
• Magazine upper tower has full length steel internal insert stamped and welded like the factory magazine
• Injection molded magazine follower
• Magazine spring formed from heat treated stainless steel
• Made in USA