These were all made before 1982. IIRC if they were made before 1983 or something 1985, they do not need to be on the roster. 100% legal and transferable. If your FFL says no, find a new FFL. There are lots of these floating around in MD, they are a seriously great deal and they shoot great. They will have a little holster wear.
Also, for like $30 you can still find the really nice walnut grips on ebay or gunbroker.