Wife's CavArms lower stag l/h M4 upper with Burris MTAC 5.8lbs When it was a Bm, factory .625 16" bbl with basic RD it weighed 5.1

My 10.5" FT with AA piston system and AR-332 optic is 6.

7" AR in 22lr is 4.6 Swap the 22 for a 10" 9mm and we're @ 4.9[ish]

All are w/out a loaded 20 or 30 rd mag.