LMT 14.5" barrel with pinned YHM Phantom, 12" Lite rail, LMT F/A bcg and CH, Troy F/R BUIS, 1.5 mid length TD rail ladders, 17 Magpul XTMs: 4.6 lbs

Add H-1 with ADM SOCOM height mount and TD short VFG with ADM QD: 5.4 lbs

Noveske lower with G&R LPK, Magpul Moe grip, stock, LMT RE + H buffer, DD QD endplate: 2.2 lbs

My scale didn't measure anything less than a tenth of a pound.