The Grand Power Stribog/UMP .45 ACP 25-Round Magazine features a high-impact polymer body with steel feed lips for superior durability, lasting performance, and reliable operation when it matters most. The injection-molded polymer follower, coupled with a high-tensile stainless steel spring, offers smooth feeding and jam-free operation. Better yet, this magazine is equipped with a translucent witness window for faster visual ammo counts in fast-action environments and boasts a removable polymer floor plate for quick disassembly.