ProMag Industries Magazine, .380 ACP, 15 Rounds, For Glock 28, Polymer Construction, Black GLK-A24 Featuring steel lined DuPont Zytel polymer construction" this affordable aftermarket magazine offers unequaled strength and superior shock and corrosion resistance in virtually any shooting application. A heat treated stainless steel spring and injection molded polymer follower work together to ensure consistent cartridge alignment and smooth" reliable feeding performance. Reinforced feed lips maximize stability for improved reliability" and precision machined witness holes allow for quick visual round counts while on the move. Better yet" this magazine comes equipped with a removable floor plate for easy disassembly for quick maintenance in the field" and precision engineered tolerances ensure flawless fit and function for superior reliability.