It's purely aesthetic my friend.
If i was going to deploy to Afghanistan with it, i'd be getting it refinished in extreme duty desert tan.
But i'm not.
I'll let you know about the P7 PSP when i get the M8 back. It will probably be about 2 months.
Here's a couple of pics of my PSP as it appears right now. The gun is very tight, extremely accurate, and has about a 90%+ finish:
