Colt 604 M16 Upper Assembly, 20" Pencil Barrel, Triangle Handguards, 5.56 NATO *Good*

Colt 604 Upper Receiver Assembly, 20" Pencil Profile Barrel, 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!
Numbered rear sight dail with raised arrow directional marker on the receiver.
Barrel is marked "C MP C" for Colt Magnetic Particle Chrome Chamber (not chrome bore).
Colt proof marks on the front right side of the slab side receiver.
Triangle handguards may have moderate wear, with some light damage.
Original slabside type upper receiver, forged front sight base with the drain hole, and birdcage flash hider.
Lower assembly, FCG parts and buttstock are NOT included.
Some light pitting in the non-chrome lined bore.
Small hole front pivot pin.
Early gray color receiver.
The ejection port cover may be damaged, requiring repair.

This Upper Assembly includes:
- Early M16 triangle handguards and straight barrel nut assembly.
- Forged type front sight base with drain hole and circle sight post.
- Early L shape 2 aperature rear sight with windage adjustment. 
- M16 carry handle upper.
- 20" pencil barrel with with birdcage flash hider.
- Early bend gas tube.

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.