So I was doing a safety test on my SA lightweight loaded model and unfortunately the hammer fell to half-cock when I released the slide without a round in the chamber. I understand this could be a couple of things: a worn connection between the hammer and sear or a worn sear spring. Anything else the brain trust can think of that might do this? How would I figure which might be causing the problem? Never had a problem at the range with this and it isn't a carry gun, so I'm not too worried at this point.