The P365 is designed as an every-day-carry pistol, while still retaining usable and reasonable magazine capacity. The magazines for this pistol are exceptionally well made, just like any Sig Sauer product. This smallest version sits flush in the base of the grip, ideal for concealed carry as this flush magazine gives the smallest overall pistol grip length. If you are looking for spare carry magazines, these flush mags are ideal. They will fit ten rounds, and another extra round can be carried in the chamber offering a 10+1 capacity. The P365 ships with one of these flush mags, and a 10 round magazine with a small grip extension.