A friend phoned and asked if I knew someone who might fix a Rizzini nonselective single trigger. I don't know much about the more modern guns. Maybe one of you can give a recommendation for him. Here's the data on the problem.

Rizzini sxs sold by A & F in the mid 1970s.
The trigger , after many years of no problems, will double part of the time. I believe it is a mechanical trigger.

Thanks for any help.