I've never read where anyone had ever done a test
on the lips of the P Mag..So I'm going to load one
to capacity & not install the locking tab.

I'll just set on my nightstand & take a look at
now & then. If there is any future changing
of the witdh of the lips, I'll post it.

If anyone has allready done this?
Please let me know.

Personally I would bet, the lips don't spread.
Even fully loaded there doesn't seem to be
a great deal of pressure on the lips.

You might want to talk to Magpul. They are barely one step ahead of you.

Yea i'm sure they are but what the hell, gives me a little
something more to do.
And to date I don't own any Magpul stock
so I'll be completely netural.

One of their employees has had a mag loaded completely in a drawer for over a year with no changes. Let us know how it goes!