Are pre-ban full-capacity magazines available for the Sig Pro?

Yes, for 9mm, .40 Auto, and .357 Sig (the two latter calibers share the same magazine).

Prior to the expiration of the ban at the federal level, Sig Pro magazines that held more than 10 rounds were illegal, due to the year of the Sig Pro's introduction. This is now no longer the case since the ban at the federal level has expired as of 09/14/2004. With the exception of Canada and certain states in the US, such as California, that continue to restrict magazine capacities, it is now completely legal to own full-capacity Sig Pro magazines, regardless of any markings that may appear on them. Still, we strongly urge you to check your local or state laws.