A firearm with safety mechanism comprising: a longitudinal axis; a frame; a hammer pivotably disposed in the frame, the hammer moveable between a rearward cocked position and a forward firing position; a sear pivotably disposed in the frame and configured to hold the hammer in the rearward cocked position; a trigger mechanism comprising a trigger and trigger bar movable therewith, the trigger bar movable to selectively engage the sear for releasing the hammer from the cocked position via a trigger pull to discharge the firearm; a manually-operated safety mechanism comprising a movable actuator and a pivotably movable safety link operably interfaced with the actuator, the safety link actuatable via moving the actuator between first and second positions; the safety link comprising a first protrusion arranged to selectively engage the hammer when the safety link is actuated, and a second protrusion arranged to selectively engage the trigger bar when the safety link is actuated; wherein via moving the actuator, the safety mechanism is changeable between a fire position in which the safety link is disengaged from the hammer and trigger bar which allows the firearm to be discharged in response to a trigger pull, and a safe position in which the safety link is engaged with the hammer and trigger bar to prevent the firearm from being discharged in response to a trigger pull; wherein the actuator is axially movable between the first and second positions, and the safety link via operation of the actuator is pivotably movable between an upper unactuated position disengaged from the hammer and trigger bar, and a lower actuated position engaged with the hammer and trigger bar; wherein the actuator comprises a lateral camming protrusion which slideably engages an arcuately curved camming surface on the safety link to rotate the safety link from the upper position to lower position when the actuator is moved; and wherein the camming protrusion pushes and rotates the safety link downwards to the lower position from the upper position when the actuator is moved between the first and second positions; a locking notch formed at one end of the camming surface of the safety link which selectively engages a complementary configured locking protrusion formed on the camming protrusion of the actuator; and a spring which biases the safety link into the upper position. a longitudinal axis; a frame; a hammer pivotably disposed in the frame, the hammer moveable between a rearward cocked position and a forward firing position; a sear pivotably disposed in the frame and configured to hold the hammer in the rearward cocked position; a trigger mechanism comprising a trigger and trigger bar movable therewith, the trigger bar movable to selectively engage the sear for releasing the hammer from the cocked position via a trigger pull to discharge the firearm; a manually-operated safety mechanism comprising a movable actuator and a pivotably movable safety link operably interfaced with the actuator, the safety link actuatable via moving the actuator between first and second positions; the safety link comprising a first protrusion arranged to selectively engage the hammer when the safety link is actuated, and a second protrusion arranged to selectively engage the trigger bar when the safety link is actuated; wherein via moving the actuator, the safety mechanism is changeable between a fire position in which the safety link is disengaged from the hammer and trigger bar which allows the firearm to be discharged in response to a trigger pull, and a safe position in which the safety link is engaged with the hammer and trigger bar to prevent the firearm from being discharged in response to a trigger pull; wherein the actuator is axially movable between the first and second positions, and the safety link via operation of the actuator is pivotably movable between an upper unactuated position disengaged from the hammer and trigger bar, and a lower actuated position engaged with the hammer and trigger bar; wherein the actuator comprises a lateral camming protrusion which slideably engages an arcuately curved camming surface on the safety link to rotate the safety link from the upper position to lower position when the actuator is moved; and wherein the camming protrusion pushes and rotates the safety link downwards to the lower position from the upper position when the actuator is moved between the first and second positions; a locking notch formed at one end of the camming surface of the safety link which selectively engages a complementary configured locking protrusion formed on the camming protrusion of the actuator; and a spring which biases the safety link into the upper position.