Yeah, the Sig is 40k. Some guys would not be comfortable shooting this type of conversion and that's certainly understandable. However, I personally don't have a problem with it.....so I'll be shooting it, but not selling it.

Just for testing purposes, I took the .357 Sig top end, with it's larger breach face and installed the 9mm barrel in it, leaving the 20 pound recoil spring, and used the .357 Sig magazine. It functioned perfectly in 9mm.

So, with a .357 Sig top end, it only takes a barrel swap to go back to 9mm.

Tony Rumore
Tromix