The PaK 41 was a 75 mm anti-tank gun designed by Krupp during the Second World War. The PaK 41 had a squeeze-bore barrel, the last 950 mm of the barrel being a tapering screw-on section providing much greater muzzle velocity. The PaK 41 fired an armour-piercing tungsten-cored shell at a muzzle velocity of 1125 meters-per-second to an effective range of 2000 metres and could penetrate 209 mm of armour at 500 metres and 177 mm of armour at 1000 metres. Research PaK 41