Constructed of heat-treated steel, the IWI® MASADA™ 9mm 17-Round Magazine is a factory OEM magazine, designed to deliver exceptionally smooth operation and reliable performance in the field. Factory-drilled witness holes deliver quick, visual round counts, while the high-tensile steel spring and polymer follower ensure reliable feeding. The precision-engineered design provides a sure fit for added reliability, and the removable floor plate allows for quick disassembly, maintenance, and cleaning.