The ETS Glock 21 .45 ACP 18-round capacity magazine is ergonomically designed for easy handling and is compatible with Glock and aftermarket floorplates. Their specially designed floorplate makes disassembly simple. The advanced polymer will return benefits such as extreme impact resistance, harsh chemical resistance, and high performance in any conditions. Its translucent body allows the user to see their ammo count and type. When storing your magazines long term the feed lips and body won't spread.