MP-Willow, the B-25G was the first version of the B-25 to be equipped with a 75mm cannon with 21rpg. Backing this weapon up were 2 .50cals with 400rpg. The later B-25H had the 75mm cannon, plus 4 .50cals in the nose and 4 more bolted on to the fuselage sides, all with 400rpg.