The correct answer to the open question is the following.
The two type of missiles that crossbows fired were the bolts or quarrels.
Crossbows were dangerous weapons used in Medieval times. The weapon also was known in many nations as a Ballistas. It served in combat and to hunt animals. Crossbows were more precise than ordinary bows and were used in bloody combats. Today, this weapon is no more used in war but a modern application of the weapon it is still used for hunting animals.
