What a difference a crisis makes! Can get a 9 mm conversion barrel for sig if u want. The link below makes fine barrels. Thing is they make them as people order but usually didnt take near as long as they say but now, who knows?
But 40 cal is a fine caliber. A few years ago, it was what people wanted. Now people frown at it. Probably not many rappers on here, but one song says, “If I pull the 40 out, better have an angel with em”! Sorry had to do it. I shoot with a lot of old guys like me so I know how much many hate rap
But back to subject, kind of. The 40 is pretty snappy but a big steel sig is not bad at all. Ammo is a little more usually but probably more available now? Here’s the barrel site: https://www.efkfiredragon.com/