The English swivel cannon should not be confused with pivot guns, which were far larger weapons mounted on a horizontal pivot, or screw guns, which are a mountain gun with a segmented barrel. *Carriage not included*
The term English swivel cannon usually refers to a small cannon, mounted on a swiveling stand or fork which allows a very wide arc of movement. Another type of firearm referred to as a swivel gun was an early flintlock combination gun with two barrels that rotated along their axes to allow the shooter to switch between rifled and smoothbore barrels.
English swivel cannons should not be confused with pivot guns, which were far larger weapons mounted on a horizontal pivot, or screw guns, which are a mountain gun with a segmented barrel.
An older term for the type is “peterero” (alternative spellings include “paterero” and “pederero”). The name was taken from the Spanish name for the gun, pedrero, a combination of the word piedra (stone) and the suffic -ero (-er), because stone was the first type of ammunition fired.
English swivel cannons 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.
Hern Cannon and mortar barrels, except the 8″ Siege Mortar and 8-3/4″ Bowling Ball Mortar , are made with Steel Liner Tubes with minimum 1/4″ wall thickness. and with welded breech plugs. For bores larger than 2 1/4″, we use 1/2″ Wall Drawn-over-Mandrel (DOM) tubing.