How much is 1 gunfoot?

A "gunfoot" is a colloquial term for a foot of measurement used in the context of firearms, particularly when referring to the length of a gun barrel. However, it's not a standard unit of measurement and can vary depending on context. Generally, one gunfoot is equivalent to one standard foot, or 12 inches. If you're asking about a specific firearm or context, please provide more details for a more precise answer.