I had them do a few AR BCG's for me, phenomenal work. NT7+ is lighter in color, compared to some old Robar NP3 BCG's I have, but the Wright Armory NT7+ is a more matte finish...I prefer it to the old Robar stuff. Carbon just wipes off with a paper towel...awesome for use with suppressors.
I've been using Wright Armory for years now...very convenient that they are less than 20 min from my front door. Consistently amazing work every time.