From the beginning, the P320 was built to be a pistol that could adapt to meet the user's specific needs. From grip modules and magazines to custom slides, barrels, and optics, the P320 can be configured in thousands of different ways to make your P320 unique and exactly the pistol you are looking for. This fire control unit is a serialized firearm and must be shipped to an FFL. FEATURES: - Compatible with all 9mm/357SIG/40SW P320 post-upgrade accessories - Exclusive titanium nitride frame and skeletonized trigger - Custom "FCU######" serial number