Greetings all. I'm negotiating with a seller who has a stainless ROA, adjustable sights, 7.5" bbl that has a 4 digit serial number with no prefix. He inherited the gun and knows next to nothing about it other than it appears to be unfired. I can't find any information on any ROA with that style serial number. He thinks it may have come from one of the specialty distributors, such as Hortons, but he isn't sure. Anybody have any idea of the origins of this gun???