Beretta APX Grip Frame color it's sold with two additional back straps: thin and large size. Unique modular chassis system allows replacement reconfiguration size tailoring including: Different sizes Different color grip frames Customization of the frame without destroying the gun (stippling) Ability to easily customize your APX; modifications like _stippling_ become less risky thanks to an easily-interchangeable frame. The break-down of the gun in its basic subcomponents also allows users to maintain their APX more easily.Image may not be representative of color or style.