Colt HBAR A2 complete upper receiver with an M16 Cut BCI-Defense lower receiver. 

AR15 HBAR / M16A2 HBAR Retro Rifle - Colt HBAR complete upper receiver marked “Colt 223” on the left side. features a matte black finish, 20" Colt HBAR barrel, A2 flash hider, A2 winged post front sight with bayonet lug, rifle length black synthetic handguard, standard charging handle, M16 profile BCG, and carry handle upper with A2 adjustable dual aperture rear sight, dust cover, shell deflector & forward assist.  Barrel marked C MP 5.56 NATO 1/9 HBAR.  

The lower is a BCI Defense M16 cut lower receiver with full auto marking on both sides of the lower receiver, M16 fire control group, Semi-Automatic  

CONDITION: Excellent, Semi-Automatic Colt HBAR-A2 upper, with a matte black finish. Barrel Length: 20" Caliber/Bore: .223.  Will not ship; sold to Arizona residents only with valid Arizona identification