Legally, of course, the designs are theirs... However you would think it appropriate to acknowledge the history of the design. In fact, some customers might find that to be a selling point, no?
I would agree with you Duane, except that in my opinion, the majority of gun owners that would even think about purchasing a firearm from Remington, especially in that price range, have never even heard of the name Rohrbaugh. A small amount of potential customers might find that to be a selling point. I think that Remington has a larger market share on their mind.