The main armament of the "Bayan"-class ships consisted of two 203mm 45 caliber Pattern 1892 45-caliber guns in single-gun turrets fore and aft of the superstructure. The guns fired a shell at a muzzle velocity of . At an elevation of +15°, they had a range of . The ships' eight 45-caliber 152 mm 45 caliber Pattern 1892 Canet Model 1891 quick-firing (QF) guns were mounted in casemates on the sides of the ship's hull. They fired shells that weighed with a muzzle velocity of . They had a range of when fired at an elevation of +20°.