SKU: PROGLKA17
UPC: 708279014758
MPN: GLKA17
The Pro-Mag GLKA17 delivers 22 rounds of .45 ACP capacity for Glock 21 and Glock 30 owners who want extended firepower without swapping platforms. Manufactured in the United States, this aftermarket magazine doubles the standard capacity of factory Glock 45 ACP magazines while maintaining reliable feeding. For shooters running high-round-count range sessions, competition stages, or simply wanting fewer reloads during practice, this magazine addresses the capacity gap that factory options leave behind. We stock this alongside our full selection of magazines for pistol, rifle, and shotgun platforms.
Pro-Mag built the GLKA17 around a DuPont Zytel polymer body chosen for its dimensional stability under temperature swings and repeated use. Inside, a full-length steel insert runs the magazine's length, stamped and welded in the same configuration as factory Glock magazines. The injection-molded follower tracks consistently through the feed cycle, while the spring uses heat-treated chrome silicon wire engineered to resist set and maintain tension over thousands of compression cycles. The black exterior finish resists wear and maintains a clean appearance. This construction approach mirrors OEM methodology while extending capacity—a combination that matters for Glock 45 ACP shooters who push round counts during training or competition. Compatible with both the full-size G21 and compact G30 frames, it serves as a standardized high-capacity option across your .45 ACP Glock collection.
Range training and competition shooting are where the GLKA17 earns its keep. The 22-round capacity means longer strings of fire before reloads, which translates to more trigger time per magazine and smoother practice sessions. Pro-Mag backs this magazine with a lifetime guarantee against manufacturer defects, providing long-term confidence in the product. For shooters building out their handgun setup or stocking spare magazines for their Glock 21 or 30, this extended-capacity option fills the gap between factory offerings and serious training demands. Browse our shooting accessories for additional gear to complement your range kit.
Yes, this magazine is designed for compatibility with both the full-size Glock 21 and the compact Glock 30. Both pistols are chambered in .45 ACP and share magazine compatibility, though the extended length will protrude below the G30's compact grip.
The body uses DuPont Zytel polymer selected for dimensional stability. Inside, a full-length steel insert is stamped and welded in factory magazine style. The spring is heat-treated chrome silicon wire, and the follower is injection-molded polymer.
Pro-Mag backs the GLKA17 with a lifetime guarantee against manufacturer defects. This covers issues with materials and workmanship throughout the product's service life, giving shooters confidence in their investment.
Yes, Pro-Mag manufactures this magazine in the United States. The company produces aftermarket magazines domestically, maintaining quality control over materials and assembly processes.
Factory Glock 21 magazines hold 13 rounds, while factory G30 magazines hold 10 rounds. The Pro-Mag GLKA17's 22-round capacity nearly doubles the G21's capacity and more than doubles the G30's standard capacity.
WARNING ⚠️ You must be 18 or older to purchase shotgun or rifle ammunition and 21 or older to purchase handgun ammunition and firearms. Please reference our requirements for ammunition orders to "restricted" states HERE. Always make sure you use the correct ammunition for your firearms. Ammo cannot be shipped to a PO Box. Please reference state & local laws before making a firearm or ammunition purchase.
Elite Tactical Systems Group
