all billet receivers w/m4 ramps and fa. Carbine gas sys with lowpro blocks. 16" 556 xxtreme phosp 1-8 bbl, 12.5" quad rail, a2 fh, gi ch-handle, no bcg. >>>>SOLD>>>> 16" 556 xxtreme phosp 1-8 bbl, 12.5" quad rail, pws-type fh, gi ch-handle, no bcg. $385 >>>sold 16" 556 xxtreme phosp 1-8 bbl...