The Scott back action lock is one of the best. One of the main early objections to hammerless guns was there was not a way to quickly check to see if a gun was cocked. Scott's crystal indicator allows one to instantly check the condition of the gun. Works perfectly. Big advantage it has over the more common protruding pins that act as cocking indicators is it does not provide a way for moisture to enter the locks or action.

John McCain is my war hero.