Just went and looked at the PX. Kinda funky looking, but you say it works and I'll take your word on that. I have one plastic pistol (XD-S 40) and I keep it because it hides in my pockets quite nicely.
I was just expressing a wish for a delayed mechanism pistol to help with slide velocity and wear and tear. The 1911 is a straight blow back design and as such was intended for the low pressures of the 45 ACP as it existed 120 years ago. Not for the cartridges of today. Now TBH there are things that can be done (I have done them) to lessen the severity of today's higher pressure cartridges and allow the 1911 a better chance to survive. But they only slightly mitigate the problem, not solve it.
The Desert Eagle uses a rotary bolt design IIRC, and that is better suited to high(er) pressure cartridges than a straight blow back design. But it is a monster of a hand cannon.
In order to fit within a design constraint suitable for use as a carry weapon, maybe a gas operated design might be better suited? A well known gunsmith (I'm having a senior moment and cannot recall his name) made a modified 1911 that was gas operated, but that is all I know about it.
Just doing some mental exercises on a Sat. morning.