I sold them and worked on them on the bench for almost a decade.
my 28ga ou is a BR110 and I have the same in 12ga with 32" barrels.
they're decent guns for the money. Every design has its issues and I saw plenty of Rizzini's with bent barrel selectors so they would either double or not fire at all. Not switching barrels unless the safety is off usually stopped that issue from coming .
Fierce Rifles imports them so major service heads that way, they can be difficult to reach at times but the guys in Italy do care about their product and will make it right from what I've seen.