This 27-round magazine is engineered to feed reliably in your Glock 22, 23, or 27 chambered in .40 S&W. ProMag has built a reputation for quality American-made magazines that perform when it matters.
Polymer Body: The magazine body is constructed from DuPont Zytel, a proprietary polymer that resists wear and environmental stress. This material has proven itself in demanding conditions across the shooting sports.
Steel Insert: A full-length steel internal insert is stamped and welded into the polymer body, mirroring the construction of factory Glock magazines. This reinforcement ensures the magazine maintains its shape and function through thousands of rounds.
Spring and Follower: The magazine spring is precision-wound from heat-treated chrome silicon wire—the same material used in quality factory magazines. The injection-molded follower is designed to feed rounds smoothly and reliably.
Every ProMag magazine is manufactured in the USA and backed by a lifetime guarantee against manufacturer defects. The assembly process includes multiple quality checkpoints to ensure consistent performance from magazine to magazine.