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".^[1]

The AC 47 was principally used as a defensive weapon, since its portability was intentionally limited to prevent the weapon from being turned on defending troops if a fortification was captured.^[2]

• 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.

• 47 mm APX anti-tank gun

• Truttmann, Philippe (1985). La Ligne Maginot ou la muraille de France. Gérard Klopp. ISBN 978-2911992612.