From what I have read, they install an altogether different Safety / Decocker System and I believe it also includes a new Firing Pin .... not sure what else
So I'm guessing that entire end of the Slide gets a good working-over
And supposedly, they also throw in a 10 Round Magazine, a P15/10
Can't seem to find a bit of info on this Magazine, so I'm not sure what it's even for ! ? ! turns-out, the P15 is an old style P85 Mag .... /10 or /15 Rounds
Who needs a 10 Round Mag for their P85 MkII ?