For sale is a used SIG P-229 in.40 S&W along with a.357 SIG barrel for a quick caliber swap. Comes with 2 magazines. One of the magazines has a +2 base plate. The magazines work for both calibers as the diameter of the cartridge case is the same for.40 S&W and.357 SIG. The same recoil spring also works for both calibers. Case included.