FRONTIER SWIVEL GUN Swivel guns are among the smallest types of cannon, typically measuring less than 1 m (3 ft) in length and with a bore diameter of up to 3.5 cm (1¼ in). They can fire a variety of ammunition but were generally used to fire grapeshot and similar types of small-diameter shot, though they could also fire small caliber round shot.
Most swivel guns were muzzleloaders. They were aimed through the use of a wooden handle, somewhat similar in shape to a baseball bat, attached to the breech of the weapon. Some Swivel Guns were designed as breech-loading swivel guns as early as the 16th century, making them among the first such examples of this type of weapon. Breech-loading swivel guns had a breech shaped like a beer mug, which the gunner would take by the handle and insert into the body of the swivel gun with the breech’s opening facing forwards.