Lever action
A lever action is a type of action for repeating firearms that uses a manually operated cocking handle located around the trigger guard area (often incorporating it) that pivots forward to move the bolt via internal linkages which will feed and extract cartridges into and out of the chamber and cock the hammer or firing pin mechanism. Traditionally, the safety mechanism for a lever action is known as the "half-back" or "half-cock", which involves the hammer being pulled about a quarter to half the way back (depending on manufacturer) from its forward position, holding the hammer off the firing pin, preventing accidental discharge if the rifle is dropped; in more recent lever-action firearms made since the mid-20th century, the hammer in half-cock also engages a transfer bar that prevents the trigger from being pulled.