I hate to say it but I would send it in to Beretta and have them take a look at it. I have seen this happen to a couple of Beretta 92's before. More than likely, the ammunition was loaded incorrectly resulting in overpressure. Beretta's handle the overpressure by three different methods. Pressure forward propelling the obstruction or object, Pressure upward resulting in a puff or blown barrel, or Pressure reward resulting in rupture cartridge and mass pressure recoil. The good thing about the Beretta design is that the pressure upward can expand due to the slide opening up above. Reward pressure usually is absorbed into the rear lower receiver section. Within your photos, it appears that the reward pressure blew the case and the gases expanded reward damaging the receiver and/or internal lower components. Once the factory looks over the receiver, if all looks good, more than likely you will need to just replace the inside trigger, springs, and trigger bar. Wish you the best of luck. Better to be safe in the long run.