Notes: This autocannon is fitted to the British FV-510 Warrior IFV and the FV-107 Scimitar. It was designed in the early 1960s to defeat known and projected armored personnel carriers of the time. Requirements at the time included penetration, accuracy, low weight, and ease of operation. This partially why the ROF was kept so low (90 rounds per minute); another reason was to prevent wasteful ammunition usage.