Stoeger 34096 STR-9SC Sub-Compact 9mm Handgun Magazine – 13 Rounds – STR-9SC Sub-Compact Magazine, 9mm 13 Round. This magazine from Stoeger is designed for the STR-9SC Sub-Compact semi-automatic striker-fired pistol chambered in 9mm. This mag is has a 13 round capacity, features a nickel plated finish and has a durable black polymer floorplate. This quality factory original Stoeger magazine makes for a great backup or spare mag to your trusted STR-9SC pistol.