Product Description The ProMag GLK-A13 pistol magazine is designed for Glock 22/23/27 in .40 S&W and offers extended capacity in a durable black polymer body. ProMag magazines are made in the USA and backed by a lifetime guarantee against manufacturer defects. Each magazine is assembled with careful quality checks, and features a precision-wound magazine spring made from heat-treated chrome silicon wire for consistent feeding and long-term reliability. Product Highlights Extended 27-round capacity for Glock 22/23/27 pistols chambered in .40 S&W Durable polymer construction engineered for dependable use Precision-wound, heat-treated chrome silicon spring for reliable performance Made in the USA and backed by ProMag&&';;s lifetime guarantee against manufacturer defects Quality-checked assembly process to help ensure consistent fit and function Specs Brand: ProMag Industries Manufacturer Part Number: GLK-A13 UPC: 708279013706 Firearm Compatibility: Glock 22 / Glock 23 / Glock 27 Caliber: .40 S&W Capacity: 27 rounds Material: Polymer Color: Black Made in: USA Spring Material: Heat-treated chrome silicon wire Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&&';;s manufacturer.