Thank you for the post. Yes, an indicator if it is an m2 or M1 is the “ear” on the extension of an m2 or the “ring” to prevent over/under insertion. Therein likes the problem determine the two if photos (of which I’ve ran across) do not show a closeup of the extension/barrel joint. Nor will they rotate the barrel to a degree where you can determine if it’s an m1 or m2 extension. I’ll be honest, I just received an m2 barrel that was marketed as an m1. Talk about luck! I spent other monies in prep for the arrival with no use….
I can with surety recall seeing a blued extension. The premise is that if the extension is blued, the rest of the barrel is as well.
Regarding snapping up M1 for M2…..all I can say is be on the lookout. If you need it, keep looking daily. Yeah, parts are drying up. No longer are parts kits sub 250 or near….all thanks to a recent news article.
If anyone wants to trade for mint factory Benelli S Nova parts, let me know. I may also have either a mint m2 comfort or late model standard straight that is dimensionally identical (cage and all). Depends on what route I want to go down.