Hello all, I am new to this forum and just started the process of building my first AR. I am going with a Sabre Defence lower receiver. I have already installed my lower parts kit and the Sabre proprietary two-stage trigger. I am looking for suggestions and tips on what I should be thinking about for my upper . I am thinking flat top M4 style 16 inch chrome lined fluted barrel. Flip up front and rear buis and maybe a surefire M73 Quad rail with light mounted and a forward grip(Eotech to come later). Also, is it worth going with the Les Baer National Match Bolt Carrier?

Also check out the picture threads for ideas on what you want it to look like.