
Five can be found among the wreckage of the Bar Harbor Museum, along the shore east-northeast of the Cliff's Edge Hotel.Two can be found in a bucket in the Nucleus, up in the catwalks at the end of the first hallway to the west after exiting the end of the Nucleus Command Center, next to a huge pile of cans.Can be found by the eyebot pod in various containers in the Commonwealth.Occasionally sold by vendors in small amounts, usually by those that specialize in weapons and ammunition after receiving the Broadsider from Ironsides in the quest Last Voyage of the U.S.S.Ten cannonballs can be found at the back of Fort Strong, next to a group of cannons.

Ten can be found in the Castle tunnels.

The armory is unlocked during the quest Old Guns.
