Strap for a double barreled shotgun

[Firstorm Chris]

I was wondering if they ever used a strap for double barreled shotguns if you were hiding it under a duster. Not the standard shoulder sling but a strap that goes around the back of your neck and under one arm so that you can hang a double barreled shotgun from it and then wear a duster over it, thus concealing it. At least that's what you see in the movies but I never saw what kind of strap they used. For the role playing aspect of CAS I like to take on the role of a bounty hunter and I figure they did that.