I have two C&H optic plates for the sig 320x carry with the optic cutout in front of the rear sight. One plate will fit the holsun 407k and 507K, the other will fit holsun 407c and 507c. I am selling them as a pair asking $75 for both . The plates do not come with the packaging, but I have the screws. If you are interested, please give me a call or text 434-365-8595