Lightweight but incredibly strong, the PMAG D-50 is a highly-reliable, 9x19mm Parabellum, 50-round drum magazine. Robust stainless-steel internals withstand corrosion and long-term loaded storage with no loss of function. Simple disassembly for cleaning and easy re-assembly.

 https://invictusgearcompany.corefire.shop/product/magpul-mag1137-blk-pmag-d-50-gl9-9mm-luger-fits-glock-50rd-black-drum