Firearm hammer with pivoting cocking spur

A firearm hammer that has its cocking spur attached in a hinged manner that is constantly biased to the closed position. Upon sufficiently applied force, the cocking spur can pivot about the hinge from the closed position to a plurality of open positions, and then due to the constant bias, the cocking spur automatically and rapidly returns to the closed position. In one embodiment, a spring at the hinge causes the constant bias of the cocking spur to the closed position. In the closed position, the cocking spur rests upon the main body of the hammer and is thereby supported to allow the hammer to be cocked. This invention reduces the probability of snagging the hammer on clothing as the firearm is drawn for use. This invention also allows instinctive use of the cocking spur since it is automatically and rapidly returned to the closed position after deviations thereof.