A stock, also known as a shoulder stock, a buttstock, or simply a butt is a part of a rifle or other firearm, to which the barrel and firing mechanism are attached. It is held firmly against the shooter's shoulder when firing the gun. Stocks are also found on crossbows, though a crossbow stock is properly called a tiller. The stock provides a means for the shooter to firmly support the device and easily aim it. The stock also transmits recoil (the shock of firing the weapon) into the shooter's shoulder. The term stock dates to 1571 and comes from the Germanic word stoc, meaning tree trunk. This refers to the wooden nature of the gunstock.