I was looking to build a P365 and just wanted to buy the FCU-only. But I Just spoke with my local FFL and he's telling me that they're not selling the FCU by itself anymore because they've had several people come back and tell them the Sheriff's department won't allow them to register it on their CCW license because the FCU is DROS'd as 0-caliber and the CCW card requires the gun to have a registered caliber. Is this true that the FCU has to be registered as 0-caliber? anyone experience a similar issue?