Afraid I'm going to have to eat some Crow here on this one, as I've made a gigantic Boo-Boo!!!
When I answered this thread, I got my model numbers mixed up and was actually thinking of the PT909, a Taurus Pistol that should have been more popular than it was..

Taurus PT909
The PT909's upper Slide Assembly
IS NOT at all compatible with the PT92/99 Frame, even though the PT909's Frame design was derived from the PT92/99.
The PT917 C Slide Assembly
should however, be compatible with the PT92/99 Frame, with some caveats.
The main differences are that the PT92 Frame front dust cover may be a hair long for the PT917 C Slide and the PT917 C Frame is a bit beefier by the take down latch.
With the latter in mind, a limited amount of +P Ammunition might be wise. Also, Magazines between the PT917 C and PT92/99
ARE compatible.
BTW, a PT917 C is on my ever growing "Wants" list.

Taurus PT917 C
I'll have my Crow served well done, now, and without Shotgun Pellets.
