Colt 604 M16 Upper Assembly 1969-1971, 20" Barrel, 5.56X45 NATO, Slick Side Bolt Carrier, *Fair*

Late Colt Model 604 Upper Receiver Assembly 1969-1971, 20" Barrel, 5.56x45 NATO, inventory number marked on left side, black triangle handguard, with A1 flash hider & charging handle, slickside bolt carrier assembly, in *Fair* condition.

Sold Individually.

Own a part of history with this collectible Colt Manufactured upper assembly!
M-16 upper receiver with numbered rear sight knob and raised arrow directional markings.
Late 604 "C MP C" (Colt, Magnetic Particle, Chrome Chamber) marked barrel. 
These were mated to a slabside receiver with No forward assist or casing deflector.
Possible years of production on this assembly are between 1969 and 1971.
These receiver assemblies have the Colt proof marks on the front right side of the receiver.
Left side of the receiver has inventory control markings / engravings (as pictured).
Bore is in *Fair* condition.
Black polymer triangle type handguards are in *Fair* condition, and may have small cracks.
Includes M16A1 charging handle, slickside bolt carrier assembly and A1 type flash hider.
Lower assembly, FCG parts and buttstock are NOT included.

This Upper Assembly includes:
- Vietnam Era M16A1 triangle type handguard assembly with handguard cap and straight barrel nut assembly.
- Late forged type front sight base.
- Fixed rear sight with L-shape sights and windage adjustment. 
- M16 style carry handle upper, with dust cover, early bend gas tube.
- 20" barrel with A1 type "Birdcage" flash hider.
-Chrome lined chamber.

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.