finishing up my AR build ... ended up with 2 rifles instead of 1 ... my ? is : the buttstock i am considering is the MAGPUL ACS-L ... this rifle has JSE 16" dissipator upper w LAR quad-rail type forend & currently wears MAGPUL flip-up rear sight , contemplating optics but that is down the road ($$$...)... anyone have likes/dislikes/opinions about this stock ?