Product Description The Warne 3126 Magazine Extension is a durable, ergonomic base extension designed to increase capacity and improve handling on factory Glock 19 and Glock 23 magazines. Precision machined from 6061-T6 aluminum and finished in a hardcoat anodized black, it adds +5 rounds in 9mm Luger and +4 rounds in .40 S&W while maintaining a streamlined profile. Its ergonomic shape aids insertion, and the integrated finger grooves help you strip the magazine from the handgun if needed. Product Highlights Fits factory Glock 19 and Glock 23 magazines for a secure, purpose-built upgrade Increases capacity by +5 rounds (9mm Luger) or +4 rounds (.40 S&W) Machined from lightweight, strong 6061-T6 aluminum for long-lasting performance Hardcoat anodized black finish helps resist abrasion and corrosion Ergonomic shape with finger grooves supports positive handling and magazine stripping Specs Brand: Warne Manufacturer Part Number: 3126 UPC: 656813107780 Product Type: Handgun magazine extension / base extension Compatibility: Glock 19 and Glock 23 factory magazines Added Capacity: +5 rounds (9mm Luger), +4 rounds (.40 S&W) Material: 6061-T6 aluminum Finish/Color: Hardcoat anodized, black Weight: 0.1 lb 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.