The Shield Arms Glock 17/22/34/35/45 Magazine Extension enhances your Glock's magazine capacity, adding 5-round to the Glock 17/34/45 mags and 4-round to the Glock 22/35 mags. Its unique floor plate design allows easy access to the spring and follower, enabling quick maintenance without needing to remove the extension. This extension comes with a 100% lifetime warranty and the Shield Arms Spring for Life guarantee, ensuring long-term reliability and support for your magazine upgrade.