I may have misunderstood what you meant by raised rib. I consider a flat rib raised, too, above what a concave game rib normally is. But, I think you're referring to a rib that is raised so much that there must be a ramp at the rear. My bad.

That type ramp doesn't bother my shooting. I shoot that type rib on my MX8 very well. But, I don't care for the looks of one that high on a S X S. A simple flat rib is high enough for me, and I much prefer them over a concave, English style game gun rib.

Thanks, SRH

May God bless America and those who defend her.