In case the hand gun results a failure, I designed an alternative, the breast buster. The gynoid has the liberty to activated it at will.

The muzzle is hidden underneath the bosom. Just by opening the silicone case of the false breasts the muzzle of the pistol can be seen. The exoskeleton safely adjusts the pistol in place. The hinges are located on the clavicle of the gynoid, covered by a layer of silicone. It can be opened at the bottom of the breast.

Though this is only a prototype, upon further consideration, it is better for the silicon case (or breast compartment) to open sideways for better maneuverability.

The ribcage is useful for storing bullets akin to a machine gun.