S&W M&P and SIG Sauer mag pouches are fitted for the polymer double-stack magazines used across M&P 9/40 and P320/P226/P229 platforms—USPSA Production, Carry Optics, and IDPA SSP/CO mainstays. Retention geometry accounts for the distinct M&P and SIG basepad widths and toe profiles. Single and double configurations cover both Production reload cadences and faster Open-style setups. Fast same-day shipping on most orders at Shooters Connection.