OK, I looked some stuff up on line. I guess only a semi auto-gun with a hammer would have a decocker. I assume that if the gun is in the ready to shoot mode, and you need to get out of that mode for any reason you would push the decocker and move the hammer forward without worrying about discharging. What is decock vs. decock only though. I am now looking at the Ruger P95 and they have deock and decock only. Still a little foggy.