So, I have both the PCR and the P-01 in Urban grey. Are there any issues with a barrel swap on occasion? I know with aftermarket threaded barrels we read "some adjustments" may have to be made. Is that the case with factory barrels? Not that this is something I'd do much, just pondered carrying the P-01 and not wanting the longer barrel. Or a temporary mod to the PCR. Crazy idea? Anyone try it?