The British Bull Dog was a popular type of solid-frame pocket revolver introduced by Philip Webley & Son of Birmingham, England, in 1872, and subsequently copied by gunmakers in continental Europe and the United States. It featured a 2.5-inch (64 mm) barrel and was chambered for .442 Webley or .450 Adams cartridges, with a five-round cylinder. Webley produced smaller scaled .320 Revolver and .380 calibre versions later, but did not mark them with the British Bull Dog name.
Measured in feet, what was the length of the gun barrel produced by Philip Webley & Son of Birmingham discussed in the above passage?
0.208 feet