During the trench warfare of WWI, the Germans developed these magazines to increase the firepower of their 98 Mausers. Easily installed in any GEW 98 rifle by merely removing the floorplate from the rifle's triggerguard, and replacing it with the trench magazine. Original trench magazines are very rare and valuable. We now have this quality reproduction indentical to the original right down to the proof marks! Will also work in 98K, KAR 98a, VZ24, and most M98 style Mauser rifles. Blued steel, complete with follower, spring and follower retainer with chain.