They are very nice indeed, at some point if money permits i will get a 70s setup.
For now i have something that's new, but could of came out of the 80's i think. 20'' HBAR, A2 furniture, Acog mounted directly on carry handle, only thing that makes it less retro is flat top, so detach carry handle.
At least it gives me option if ever i want to go a different route with this, but so far i am not the kind of guy who likes rails.
For now i will get LAR mags in the meanwhile i do find 5/20s, as a 5/30 is cumbursome for some benchrest shooting. My ar is a front heavy sob, i can't really see it becoming a 3gun rifle at any point, maybe service rifle.