ProMag 50-Round Drum Magazine for S&W 5900 – 9mm, Black Polymer

This ProMag drum magazine (mfr. part no. DRM-A43) holds 50 rounds of 9mm Luger and is built for the Smith & Wesson 5900 pistol. ProMag magazines combine stamped and welded heat-treated high-carbon steel with precision-molded mil-spec polymer.

Key Specifications

• Holds 50 rounds of 9mm Luger.
• Fits the Smith & Wesson 5900 pistol.
• Drum housing built from a proprietary DuPont Zytel-based polymer.
• Features a full-length steel internal insert, stamped and welded like the factory magazine.
• Uses an injection-molded magazine follower.
• Spring formed from heat-treated stainless steel wire.
• Backed by ProMag’s lifetime guarantee against manufacturer defects.

Frequently Asked Questions

Does ProMag back this magazine with a warranty?

Yes, it’s backed by ProMag’s lifetime guarantee against manufacturer defects.

What is the internal structure of this magazine?

A full-length steel internal insert, stamped and welded like the factory magazine, inside a DuPont Zytel polymer housing.

Buy the ProMag S&W 5900 50-Round Drum Magazine

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