Royal Ordnance L7
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The Royal Ordnance L7, officially designated Gun, 105 mm, Tank, L7, is the basic model of the United Kingdom's most successful tank gun. Wikipedia
Designed: late 1950s
Calibre: 105 mm (4.13 in)
Length: 5.89 m (19 ft 4 in)
Manufacturer: Royal Ordnance Factory; BAE Systems
Maximum firing range: 4,000 m (4,400 yd)
Rate of fire: 10 rounds per minute (maximum)
Shell: 105×617mmR