Longest range of a gun
Paris Gun
France (Paris)
The famous long-range gun that shelled Paris, France&#160;in World War I was the Paris-Gesch&#252;tz &#160;'Paris Gun', with a calibre of 21 cm (8.26 in), a designed range of 127.9 km (79.4 miles) and an achieved range of 122 km (75.8 miles) from the woods of Crepy in March 1918. <br /> The little-known V3 static underground firing tubes built in 50 shafts during World War II near Mimoyecques, not far from Calais, France, to bombard London were never operative, but would have fired projectiles a distance of some 150 km (93.2 miles).