Hi, one woud jsut have to machine..thin the bar-Sto's
lug to acept the smaller width 75SA's locking block.
Use the short recoil guide rod..or aftermarket recoil system.
Yes, he willeventually make a 40B tube in .357 SIG..but
i'm hoping for a 97B Bar-Sto in 10mm. First!
The 97B just fits me better, and fits my needs.