I just got a AR-15 and I need to know how to lock it up from my kids with the gun lock that came from it. I know how to do this with a pistol, but I am a new gun owner and new to AR's. It comes with one of those little locks that have a short cable, you know. Where do I put the lock? Through the chamber area? Don't forget when you answer that I don't know anything about AR's yet, so try not to talk over my head terminology, please.