I have a sig that does .357 sig, 40S&W or 45 acp. I screwed up by not getting all the barrels and mags. Now you cant find them They used to be like $25 a pop.
It's a sound concept, it just wasnt executed well in the sig mauser M2.
Its bulky and the trigger sucks.
The rotary locking barrel was a good design.
I can use the 40 mags for the 357 too so I read on the internets. If not I can buy the Glock Sig mags too like I had to for the 9mm. Interesting my Gun Shop never told me I could do any of this, found it all out looking for parts at glockstore.com but not for this.