English: This picture illustrates the North American Arms 22 magnum Black Widow revolver cylinder in the safety position. Note that slightly less than one-half of a cartridge is visible on each side of the hammer and two other safety notches are in the 2 & 10 o'clock positions. The hammer must be partly cocked and released while holding the trigger in the firing position to position it in the safety notch. If the hammer is in the correct position the cylinder will not rotate. The hammer must not rest over a live round else the weapon can discharge if the hammer is struck. The 22 long rifle model is the same.