Sig Sauer Magazine, 9MM, 21 Rounds, Fits Sig P365/X/XL/X-Marco/AXG Legion/Fuse, Steel, Black 8901594 Trusted by military, police and civilians for decades, SIG SAUER has earned a worldwide reputation for the unquestioned accuracy and unflinching reliability of its pistols and rifles. SIG SAUER magazines provide exceptional fit and reliable feeding in their high quality firearms.