Thanks,
I did dig around on Briley's website and found no indication that they thread for Beretta - I will give them a call, just to verify that. I have had Briley put choke tubes in a few of my older guns, they were thin wall type and turned out nice.
I am cutting down a Benelli SBE barrel, with the intent of getting a turkey/home defense/bear gun. So I am not worried about having enough barrel barrel thickness.
It just surprises me that no one else has invested in a reamer and tap for Beretta, seems like you would have the market cornered if you did!