Colt AR-15 "SP-1", .223 Remington cal. semi-auto rifle.  Serial #SP87536, mfg. 1978.  Excellent condition.  20" barrel is marked "C MP Chrome Bore", and has an excellent bore, adjustable post front sight and adjustable two-position rear peep sight.  Carry handle.  "C" marked bolt carrier assembly.  Near 100% matte black finish with light scuffs and marks.  Black triangular ventilated hard guard.  Black checkered pistol grip.  Fixed A2 black stock with some light marks.  Cleaning kit in the butt.  Comes with one Colt AR-15 marked 20 round magazine and black nylon sling.  Nice early collector quality AR-15!