My Mossberg 12ga 500A is on a wall-rack, 7' up. It's loaded, but the chamber is empty. The safety is on, and I've already cycled the slide once. Thus to fire the weapon, it must be removed from the rack high up on the wall, slide release button must be depressed, slide must be cycled properly, the safety turned off, and the trigger pulled. I can do this all in 2 seconds. An adult unfamiliar with the firearm will have some difficulty figuring this all out in a short period of time. A young child will probably not be able to do all of this, at least not unless left unsupervised for a stupidly long period of time. My 7-y.o. would never even attempt this, because she Knows The Rules.