While some weapons, like longbows and staff slings, require both hands and focus, some smaller weapons can be fired, although with less accuracy, even in the archer's non-primary hand. This is challenging, and only masters can pull off trick shots with their left hand. 1% and up: slingshots 21% and up: light crossbows 41% and up: slings 61% and up: medium crossbows 81% and up: heavy crossbows 101% and up: shortbows Skill chance reduces the penalty, regardless of weapon type. Regardless of skill%, you cannot fire an overwielded weapon offhand.