Expand the capacity and functionality of your Glock 17/22 with this durable Warne Magazine Extension. Precision-machined from 6061-T6 aluminum with a hardcoat anodized finish it adds 5 rounds of 9mm or 4 rounds of .40 S&W increasing magazine capacity while maintaining reliability. Its ergonomic design allows for smoother magazine insertion while integrated finger grooves ensure easy stripping from the handgun when needed. Perfectly compatible with G17 models this high-quality magazine extension combines practicality and toughness for enhanced performance.