Wilson TC:
The P7 is gas operated, almost all pistols are delayed blowback or blowback operated.
The proximity of the gas piston to the trigger guard causes it to get very hot.
I'm thinking that a thermal barrier like a jet-hot ceramic coating, like you'd get done to engine headers should be effective. If not, i'll probably pay a gunsmith to silver-solder or epoxy a custom heat shield onto it for me.
A used P7M8 is another
$500 over what i want to spend just to get a conventional mag release and heat shield. I cannot justify the expense. I cannot possibly imagine it would cost anywhere near $500.00 to have some sort of small custom heat shield installed, but i'd prefer to get a finish that would provide a thermal barrier if at all possible.
Here is a good pic of the P7M8 heatshield just above the trigger:
