ProMag Industries 20-Round 9mm Magazine for Glock 17/19/26, Black Polymer w/ Steel Insert GLK-A21

Product Description

The ProMag Industries GLK-A21 is a high-capacity 20-round 9mm pistol magazine designed to fit Glock 17/19/26 platforms. Built with a proprietary DuPont Zytel-based polymer body and a full-length steel internal insert (stamped and welded like a factory magazine), it delivers dependable feeding and long-term durability. An injection-molded follower and a heat-treated chrome silicon spring support consistent performance. Made in the USA and backed by a ProMag lifetime guarantee against manufacturer’s defects.

Product Highlights

• 20-round capacity for 9mm Glock 17/19/26 pistols—ideal for range use and training
• Proprietary DuPont Zytel-based polymer magazine body for lightweight strength
• Full-length steel internal insert, stamped and welded for reinforced structure
• Injection-molded follower for smooth, reliable cartridge presentation
• Heat-treated chrome silicon spring for long service life and consistent tension

Specs

• Brand Name: ProMag Industries
• Manufacturer Part Number: GLK-A21
• UPC: 708279015861
• Type: Pistol magazine
• Caliber: 9mm
• Capacity: 20 rounds
• Compatibility: Fits Glock 17 / 19 / 26 (9mm)
• Color: Black
• Body Material: Polymer (DuPont Zytel-based)
• Internal Reinforcement: Full-length steel insert
• Spring Material: Heat-treated chrome silicon wire
• Country of Manufacture: USA

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