Carrying a gun in any way, shape, or form, violates the "4 rules". This is why I don't live by the "4 rules".
Once you are no longer an idiot in the gun world, you realize the 4 rules are only there as something to learn by.
The real fact is... the gun is not always loaded and the muzzle will sweep you or someone else if you choose to carry. The only way it won't is if you are carrying a long gun and it is slung over your shoulder pointing up... which in turn violates the 4 rules... so yeah, there's just no possible way to not violate those civilian world rules. This is why people need training and why common sense should be a requirement for life.
Wow, just wow. Hope you're not at the range when I am.