Check-Mate Full Size 1911 9 Round .38 Super Magazine Stainless. Manufactured from durable steel this magazine is designed by Check-Mate Industries for full-size 1911 pistol platforms chambered in .38 Super. This magazine features a polished stainless finish and boasts a capacity of 9 rounds of .38 Super cartridges. Each Check-Mate magazine is 100% developed and manufactured in the U.S.A. to ensure superior performance reliability quality fit and finish with your favorite firearm.