Hmm, good question. If you have an older model that doen't have a "rail", I think that your only option is a trigger guard mounted laser. Posibly one of the Rear Sight models would work even if you gun's rear sight dovetail needs to be modified.
As for my Bersa 380 CC. I had to have my dealer return it to the factory. Would not fire more than two before jamming. The on location gunsmith tried it and said it was really tight and hard to cycle. His thought...bad machining.