Springer Precision mag extensions for the Hellcat adds 4 more rounds to your 11 round magazines to increase the capacity to 15 rounds. A discreet set screw is tightened from the bottom to secure the mag extension from coming off and to avoid catching on anything. The ergonomics of the mag extension allows for a more solid grip on the pistol. Especially designed with Springer Precisions easy-on easy-off magazine lip profile that prevents binding the magazine spring.
10 round mags will not work with this extension.