>>7472812French MAS pistols normally use 9 long ammo which is somewhere in between .32 acp and .380 acp but nobody makes 9 long ammo. There is French surplus ammo from ww2 but it's corrosive and 98% of the time they don't even fire. Hence my comment.
9 m/m P means 9mm Parabellum which is marked on the slide normally. I'm guessing the poster's MAS is 9 Long which was the normal loading for the MAS 1935A and S. I believe it's also the same load for the MAS 1936 machine pistol. All three are great guns as long as you have ammo, if you don't, you're better off saving up for a reloading system with the right set of die's. Get a good book with the correct handloads for the 9 long, find brass you can cut down for the right size, and then learning to do it yourself. By the time you do all that you'll be divorced and living in a storage facility!
I think some Spanish Star pistols use about the same ammo for their 9 Largo round. Does that clear all that up for you?
