Here's another one from the National Army Museum the other day. The Tankgewehr in the picture was captured by men of the Middlesex Regiment at Bihucourt near Bapuame in the 1918. The initial usage of tanks by the British caught the Germans by surprise, but they quickly developed several anti tank methods based on bundles of grenades, small calibre anti-tank rifles like the tankgewehr, and the usage of 77mm field guns. Operated by a two man crew, the T-Gewehr could penetrate 22mm of armour at 100 metres.
Had a nice visit to the National Army Museum in Chelsea today. It's recently been redone and, although it isn't nearly as good as it used to be, there's still some interesting exhibits on the First World War. This display on the German Sturmtruppen in the Spring Offensive, when they punched their way through British lines, was particularly interesting. In the picture is a German stahlhelm, an MP-18 sub-machine gun, and a stick grenade.