This has been a question I have been wanting to ask but checked the forums first to see if the answer was laying around here somewhere. Unfortunately, I was not able to find an answer. Anyway, my question is when the USP is in double action and I pull the trigger I hear a click first before the triggers breaks. I never noticed this until a friend pointed this out to me. So I play around with it a little more and pull the trigger slightly and I hear the click and see the hammer set back slightly. Because the Sig I had available did not do this...