Because he is just a normal human, the strength to carry, much less to use and wield a sword of such magnitude with finesse and dexterity makes Guts a grandmaster swordsman of no ordinary level and skill, which shows up in every battle or duels that he partakes, especially when he is engaged with demonic beings. He is also skillful at using many bladed weapons, has knowledge on how the mechanism of complicated firearms work and is also an excellent equestrian. Despite his large frame.