I have the P01 mags with the rubber bottoms in my PCR. They work fine and no scratches.
You could put 2 layers of black electrical tape on metal bases or replace the metal with rubber (when they're back in stock)
Also I find disassembly easier using the following:
Eject mag and cycle to verify empty chamber - DO NOT COUNT ON LCI.
Leave hammer cocked
With L Hand - thumb in trigger loop, fingers over muzzle end of slide, move slide so disassembly marks line up.
Quick tap with rubber butt of mag on retaining pin
Remove retaining pin
Remove slide assembly
As the pistol ages, the locking spring on the retaining pin may get softer so that a firm finger push will release the pin.
Mine is pretty stiff so I don't see my PCR falling apart anytime soon.