We have had lots of parts breakage over fairly small round counts. Ejectors (requiring new fire control moduals), slide stops, and barrels plus rear sights becoming loose in the dovetail, . Most recently a slide cracked.
All of my guns were older production but the fire control moduals were new, and they are still breaking.
Keep in mind that our round counts are fairly high on our range guns. Even so I have not been impressed with the P99s.