Achieve ultimate performance and capacity with the Warne Mag Extension Black for Glock 17/22 magazines. Engineered from durable 6061-T6 aluminum with a sleek hardcoat anodized finish this extension adds +5 rounds for 9mm and +4 rounds for .40 caliber optimizing your firearm's tactical and practical usability. Its ergonomic design ensures smooth insertion while built-in finger grooves enhance control and allow quick magazine stripping when needed. This precision-fit magazine extension is designed for Glock G17 models making it the perfect accessory to trust in critical moments.