Our extended base pads are legal for USPSA Limited and Open competitions. Attached to the factory magazines they extend the magazine to 141.25mm length (5.56"). Whether you want to be competitive or not, these pads will extend the capacity of your Grand Power X-Calibur magazines.
This basepad will only fit the Grand Power and CZ small frame magazines! If you use them with the factory follower, you may need to do minor chamfering of bottom of follower to ensure they slip into the basepad.
Typically increases the capacity from 16+1 to 21+1 in 9mm.
Pictures and description from Henning