The AC 47 was a French anti-tank gun of 47 mm calibre. It was principally used in the ouvrages and casemates of the Maginot Line in the late 1930s; another version was created for naval use. AC stands for anti-char, char being French for "tank".
Characteristics
• Length of the tube : 2.52 m (8.26 ft) • Rifling: 16, right-handed • Penetration: At an incidence of 30° it could penetrate 77 mm of armour at 500 metres and 56 mm at 1000 metres. ==See also==