That would be a strictly custom affair.
Ask a gunsmith for help
Take it to a gunsmith
Ask a gunsmith for help
If you don't have an owner's manual, take it to a gunmsith and ask for help
Yes.
.380 1903
Take it to a gunsmith
insert a erasered pencil into the back and push in the spring, slightly pull the slide back and pull up at the same time. Be careful watch for flying parts.
Yes. 9mm Kurz (or Cortos) is the European designation for .380 ACP. also called .380 Auto.
Manuals are available for download on the SIG sight. Alternatively, take it to a gunsmith and ask for help.
Yup.