After about ten weeks, the BATFE sent me my tax stamp to put together an SBR. I plan on putting an LMT 10.5 upper on a Stag lower out fitted with a CMT LPK, CTR buttstock, MIAD grip with enhanced trigger guard. The upper will have a CMT charging handle, LMT FA BCG, Larue 7.0 rail, Larue EOtech...