Im in the process of building a new 6.8 around an AR performance 18" mid weight barrel. the lower is built but Im trying to decide on a upper. Im thinking about a Mega mid length monolithic keymod upper, anyone have any experience with one? Im trying to keep the weight down somewhat if I can. the lower is a Anderson with a ambi safety; K&N pins; geiselle high speed match trigger and STR buttstock, nothing special just a good hunting gun..
