wyzardd wrote:However, it's my understanding that you can put any caliber on a .45 frame but you can't put a .45 on a 9mm frame. Seems whoever ends up with the .45 gets the better end of this deal if true.
9mm, .357 sig, and 40 S&W all share the same frame, the 45 is the only one that is different from the rest. So if you want to upgrade from 9 to 45 you need to buy the xchange kit (slide, barrel, guide rod, and mag) and buy the 45 frame.
Lets say you have a 45 and want to shoot 9mm. Then its simple just buy the xchange kit (9mm or whatever you want) and a 9mm/357sig/40s&w frame and there you go.
Wait a minute, you have to buy frames to change from 9 to 45 or 45 to 9mm? Yep.
CORRECT ME IF IM WRONG SIG GUYS but that how it works.