10 rounds
It is now a SP2022
200-400 dollars
depending on condition $300-$450
The M11 is the Sig Sauer P228, for which a 13 round magazine is standard. It can also accept 15 or 20 round magazines common to the Sig Sauer P226.
Best left to a gunsmith or SIG trained armorer
Sig Sauer is the Manufacturers and distributors of ''SIG SAUER'' handguns, Blaser, Sauer and Mauser rifles.
Best left to a trained professional
1000 USD or so
Best left to a trained armorer
It's pronouce Sig (normally) Sauer (Sour)
sig
12-20 rounds depending on caliber and magazine.