The "Majestic"s introduced a number of significant improvements to British battleship design, including armoured gun shields for the barbette-mounted main battery guns. The ships were armed with a main battery of four BL 12-inch Mark VIII guns, the first large-calibre weapon in the Royal Navy to use smokeless propellant, which made it superior in almost all respects to earlier, larger guns. They were also the first British ships to incorporate Harvey armour, which allowed them to carry a much more comprehensive level of protection. The ships proved to be among the most successful designs of their day, and they were widely copied in foreign navies, including the Japanese and the battleship , which were both modified versions of the "Majestic" design.