Franchi 12 gauge (EXCEPT Highlander, I-12 Sporting, and Sporting SL O/U interchanges with Muller Beretta/Benelli Mobil threaded chokes.
Franchi I-12 Sporting interchanges with Muller Crio Plus style choke tubes.
Franchi 28 gauge barrels interchange with Muller 28 ga. Mobil style chokes