I can't speak for other "top tier" brands... however... The engineers at LaRue, Noveske, and LMT were all very helpful with my questions, when I was trying to decide on a rifle. All 3 gave me very sound advice and brought up questions about my intended use that I hadn't thought of.
To me, there is value in that.
Ex - Navy, Persian Gulf Veteran. Loved shooting the M14, 1911, M60, M2