The mfg. Says yes you can
no
Check the frame
Yes.
100-450 USD or so
Contact SIG for a correct and accurate answers.
Only in firearms chambered for it. SIG comes to mind, but, there are others.
MecGar
The ammunition is called .357 Sig. Most pistols in .357 Sig can shoot the .40 S&W when you drop in a .40 S&W barrel.
No. You can get a Sig P229 that will fire .357 Sig, but that is not the same as .357 magnum.
Any weapon chambered for it.
No, you should not shoot .38 Special ammo out of a Glock 31 chambered in .357 Sig. While the .38 Special and .357 Sig cartridges share the same bullet diameter, the .357 Sig operates at a much higher pressure than the .38 Special. Firing a lower-pressure cartridge in a gun designed for higher-pressure ammunition can lead to dangerous malfunctions and potentially catastrophic failures. It is crucial to always use the correct ammunition specified by the manufacturer for your firearm to ensure safe and proper operation.
Submachine gun rated 9mm