Shop › PROMAG SIG SAUER P938 9MM 10RD BL ST PROMAG SIG SAUER P938 9MM 10RD BL ST $32.99 ProMag Industries Magazine, Fits Sig Sauer P938, 9MM, 10 Rounds, Steel, Blued Finish SIG-21 Quantity: Add To Cart Added! ProMag Industries Magazine, Fits Sig Sauer P938, 9MM, 10 Rounds, Steel, Blued Finish SIG-21