The Shield Arms CZ P10C/P07 Magazine Extension adds 5 rounds of 9mm and 4 rounds of 40 S&W to your CZ P10C or P07 pistol. Their 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. Unique easy access floor plate design Index cuts on the extension body Machined from billet 6061 aluminum Type 2 anodized Comes with a +10% power spring Fits OEM CZ P10C and P07 magazines with orange follower only Proudly made in the USA Fits most aftermarket flared mag wells Lifetime warranty