I will make a schematic/diagram with the stuff by draw it by hand will be a mess. I will try to understand how to use EAGLE pcb designer so I make some decent diagram.

In the meantime, as I said, the two pics have to communicate using each one porta pin.

The communications is:
Gun-PIC send +5V to Mag-PIC who then turns its pin as output and sends back a +5v to the Gun-PIC.

I'll make my schematics and system description and source available on my website by the end of the week.

Anyway THANKS a lot for your help guys.