Okay, so even the OEM FP would not install. I have DP extended for 9mm and a Limcat extended. All no go. I did have a couple of old SV's.
I tried to insert all in reverse, just to see what the hang up was (inserting tip into breach face). EVERY one would only insert 3/16 or so. Leading me to believe there was a burr (and when I took it down for first time, the factory obviously got the FP installed but there may have been an issue pending but I never fired it).
SO, I then installed the older SV, and tapped it in. The FP protruded from the FP hole now, but it was stuck. Tapped it back out. Suddenly all FP's are working again....So a burr it must have been (air blasted it so wasn't another foreign object i believe).
First for me....