Germany invented possible the first Anti-Tank Rifle used in the last year of World War I. The Mauser Gewehr Rifle was a single shot, bolt action weapon – capable of firing a 13.2mm round to around 500 yards. The steel jacketed round was able to pierce the more or less “standard” 1 to 1.5 inch Armor plating of most Allied Tanks then in use. In theory, a shooter (Sniper Class), could fire at the front or undercowl of a Tank – and with all probability hit and kill the Driver. Although discontinued, The Mauser Anti-Tank Rifle would become the precursor to the later .50 Caliber Heavy Barreled Sniper Rifle.