ProMag GLKA21 20rd 9mm Magazine – Black

The ProMag GLKA21 is a 20-round 9mm magazine offered in a black finish and produced with attention to manufacturing quality. Assembly processes include precision-wound springs and injection-molded followers, and the product is made in the USA with a lifetime guarantee against manufacturer defects. Technical details in the original documentation emphasize consistent assembly checks and quality control.

Key Specifications

• Caliber is 9mm.
• Capacity is 20 rounds.
• Finish/Color is Black.
• Manufacturer is ProMag.
• Model designation is GLKA21.
• Product type is a pistol magazine.
• The spring is made from heat-treated chrome silicon wire.
• The follower is injection molded.
• The magazine body includes a full-length steel internal insert per manufacturer description.
• This item is made in the USA and is backed by a lifetime guarantee against manufacturer defects.

Robust and straightforward, the GLKA21 provides a high-capacity, serviceable magazine option for 9mm shooters who prioritize consistent spring performance and a factory-style internal insert. With precision-wound springs and an injection-molded follower, this magazine is intended for range use, training, and routine carry considerations where high-capacity feeding and dependable spring tension matter. The lifetime guarantee reflects the manufacturer's emphasis on assembly quality and durability.