Greetings,
I bought a P-14.45 back in the early Bill Clinton years that I carried for duty;  Love that gun!
A few years back I machined the slide for a Deltapoint Pro to help my older eyes at qualifications; Love that sight!
Now, the 1911 style is no longer accepted for duty use.
Since it's retired now, I'd like to put an iron sight slide back on it. What slide should I be looking for that will fit this old Warhorse?
Thanks,
Gos

Any 1911 slide should work as long as it's full size but it will require fitting by a gunsmith. Sarco has para parts if you want the manf. to match the frame

Got it.
I had heard that the P series and the LDL were in interchangeable, so that's why I ask here.
Thanks,
Gos

LDA?

LDA slides do not have the disconnector bump. It's not hard to put one in, but it's not a direct swap.

As far as slides go, if your P14 still has the series 80 style safety, you'll need to find a Colt, Para, or Remington R1 slide for parts swapping the safety. Sarco is out of 45 caliber para ordnance slides but gunbroker often has slides.

If you're just wanting a slide to go without the series 80 safeties, it's a straightforward safety parts removal from the frame. Nighthawk makes great parts.

https://www.nighthawkcustom.com/parts-and-accessories/main-slides

HTH

Remington bought Para, so I vote a Remington slide

https://www.ebay.com/itm/313265181588


You'll need Novak sights with that slide.

Remington (Freedom Group) killed Para-Ord for the sake of the R1.