The Shield Arms CZ P10F/P09 Magazine Extension adds 5 rounds of 9mm and 4 rounds of 40 S&W to your CZ P10F or P09 pistol. Our unique easy access floor plate design allows you to easily access the spring and follower without having to remove the extension from the magazine body. Comes with a 100% lifetime warranty and the Shield Arms Spring for Life guarantee. - For use in new style P10F / P09 mags with orange follower only. - Features - Unique easy access floor plate design to service or clean the magazine body without the need to remove the magazine extension from the magazine body. - Index cuts on the extension body to increase grip when coming out of a magazine pouch. - Machined from billet 6061 aluminum - Type 2 anodized - Fits OEM CZ P10F and P09 magazines with orange follower only - Proudly made in the USA - Fits most aftermarket flared mag wells - Ships with a +10% power spring - Lifetime warranty - Installation Instructions