Leveraging cutting-edge magazine extension technology, the Tyrant Designs Glock 43x & 48 magazine extension is the quickest and easiest to install. This extension adds 4 rounds to your factory magazine and includes a 10% power spring for enhanced performance. The machined inlay design allows for faster magazine drops and easy handling. Crafted from aerospace-grade aluminum, the CNC-machined magazine base pads provide the perfect added weight for fast and smooth drops. Instantly boost your 9mm Glock 43x/48's capacity by 4 rounds with this expertly engineered extension. Proudly made in the USA, our mag extensions feature a flawless finish and offer the most efficient way to increase the capacity of your Glock 43x & 48.