And in this center battery, we had a pair of 100-pounder Parrott Rifles! These, clearly, fared no better than most of the Rodman Guns at Fort Massachusetts. The sign 100-Pounder Parrott Rifles is in the foreground. Parrotts were rifled, and probably the most accurate guns that the fort possessed. Note to self: As Parrott Rifles are mounted on the eastern side, attack Fort Massacusetts from the western side.