If you have a post-war Sig made up until the last couple years, you have Mec-Gar magazines. Sig changed the supplier of their mags for their US made pistols (1911 and a couple others) to Checkmate.
Ok. I don’t dispute that. They were mentioned in my last post. I don’t disagree there are one-offs. I asked for a LIST of all they imply. Beretta for example. I know they make AMs but I also know factory mags are either Beretta or MDS. I have two 30 cal ammo cans. One for MDS/PB and one for AMs like Mec-Gar and others. Guess why I had to do that?
I have 15 factory mags for my Sig P320, all are Mec-Gar except for one made by Checkmate. If I remenber correctly it shipped with Mec-Gars.