I have a SIG 228. When the magazine ban was looming, and I still had my FFL, I ordered spare mags. I have the two original 13 round mags, two 15 round mags, and a 30 round mag. I especially like the 30 rounder when I go to the range. I can shoot 10 rounds at each bull of a three stack square target before I have to reload! And, with the 100 round bulk packs of Winchester 9mm ammo at Walmart for $11, I can do quite a bit of economical shooting!