Arbalet

A crossbow is a type of weapon based on the bow and consisting of a horizontal bow-like assembly mounted on a stock. It shoots projectiles called bolts or quarrels. The medieval crossbow was called by many names, most of which were derived from the word ballista, a torsion siege engine resembling a crossbow.

Historically, crossbows played a significant role in the warfare of East Asia, Europe, and the Mediterranean. The earliest crossbows in the world were invented in ancient China and caused a major shift in the role of projectile weaponry. The traditional bow and arrow had long been a specialized weapon that required a considerable training, physical strength, and expertise to operate with any degree of efficiency. In many cultures, bowmen were considered a separate and superior caste, despite usually being drawn from the common class, as their archery skill-set was essentially developed from birth (similar to many horseman cultures) and was impossible to reproduce outside a pre-established cultural tradition, which many nations lacked. In contrast, the crossbow was the first projectile weapon to be simple, cheap, and physically undemanding enough to be operated by large numbers of conscript soldiers, thus enabling virtually any nation to field a potent force of ranged crossbowmen with little expense beyond the cost of the weapons themselves.

In modern times, crossbows have been largely supplanted by firearms in most roles, but are still widely used for shooting sports, hunting, and when shooting in relative silence is an important consideration.

A crossbow is a bow mounted on a stick (called a tiller or stock) with a mechanism in it that holds the drawn bow string. The earliest designs featured a slot in the stock, down into which the string was placed. To shoot this design, a vertical rod is thrust up through a hole in the bottom of the notch, forcing the string out. This rod is usually attached perpendicular to a rear-facing lever called a trigger or tickler. A later design implemented a rolling cylindrical pawl called a nut to retain the string. This nut has a perpendicular centre slot for the bolt, and an intersecting axial slot for the string, along with a lower face or slot against which the internal trigger sits. They often also have some form of strengthening internal sear or trigger face, usually of metal. These roller nuts were either free-floating in their close-fitting hole across the stock, tied in with a binding of sinew or other strong cording; or mounted on a metal axle or pins. Removable or integral plates of wood, ivory, or metal on the sides of the stock kept the nut in place laterally. Nuts were made of antler, bone, or metal. Bows could be kept taut and ready to shoot for some time with little effort, allowing crossbowmen to aim better.

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