This pistol measures only 12 inches long (and can be modified to 10.5 inches if you saw off the end of the barrel), and is designed to be tucked into a boot or a sash (or even a hat) for use as a back-up after your primary arm has been fired (or snuck into rapier combat... Surprise!!). This design doesn't adhere strictly to any period firearm, but it uses a fairly ordinary and common basic shape that will easily pass as period.