"Armstrong Disappearing Guns" . "his rifled breechloaders" . . "Armstrong screw breech guns" . . . "Armstrong breechloaders" . "Armstrong gun" . "Armstrong breech-loaders" . . "his rifled breech loading (RBL) gun" . "Armstrong gun" . . . . . "the first" . . . . . "Armstrong" . . "gun" . . . "Armstrong Guns" . . "Armstrong Gun" . . .