I don't have a good scale, but I would make an educated guess that this thing is around 4.5 lbs.
Cav Arms lower, Bushmaster carbon fiber upper, Shaw lightweight 16" barrel, DPMS carbon fiber ff tube, RRA bolt, carrier, and charging handle. Great shape-
$570 Or trade for Colt M-4 or nice quality custom upper.
ETA- LPK is unknown, barrel and B/bc/ch have about 250 rounds or less on them.