SIG SAUER P250/P320 9MM 10 ROUND MAGAZINE FIT P-320 PISTOLSIG SAUER P250 P320 9MM 10 ROUND MAGAZINE This is a factory replacement or spare magazine for the full size SIG Sauer P250 or P320 chambered in 9mm Luger. Choosing original equipment manufacturer magazines assures you that your new magazine will have the same high quality materials and attention to detail that went into the magazines originally supplied with your firearm.