Colt SP1 AR-15 Upper Assembly, 20" Pencil Barrel, No Forward Assist, A1 Birdcage, Large Hole Front Pivot Pin, 5.56x45 NATO *Good*

Colt AR15 SP-1 Upper Receiver Assembly, 20" Pencil Profile Barrel, no forward assist, A1 Birdcage flash hider, triangle handguards, 5.56X45 NATO, in *Good* condition.

Sold Individually.

Own a part of history with this early Colt Manufactured upper assembly!
Possible years of production of are between 1975-1984.
Numbered rear sight knob with directional markings on receiver.
The gray anodized reciever has the large hole front pivot pin, common to the SP1 rifles.
Colt forge markings on the front right side of the receiver.
Early cast front sight base and "L" rear sight.
Pencil profile barrel is marked "C MP CHROME BORE".
The chrome lined bore is in Good condition with some light spots.
Triangle handguards with straight barrel nut assembly.
Some light scuffs and scratches on the handguards, but not cracks or breaks.
Later style forged front sight base with the drain hole and a "C" marking on the right side.
Circle front sight post.
Lower assembly, bolt assembly, FCG parts and buttstock are NOT included.

This Upper Assembly includes:
- Early M16 triangle type handguard cap with triangle handguards, and straight barrel nut assembly.
- Forged front sight base with hole and circle sight post.
- L shape rear sight with windage adjustment. 
- M16 A1 style carry handle upper.
- 20" pencil profile barrel with A1 birdcage flash hider.
- Late bend gas tube.
- Large hole front pivot pin.

Parts must be inspected and tested by a qualified and competent gunsmith or armorer before use in a firearm.
Not all firearm parts are interchangeable; use of surplus parts without proper knowledge could cause a firearm to malfunction and cause property damage, injury or death.