Colt 604 M16 Upper Assembly 1967-1969, 20" Barrel, 5.56X45 NATO, A1 Flash Hider, *Very Good*

Early Colt Model 604 Upper Receiver Assembly 1967-1969, 20" Barrel, 5.56x45 NATO, black triangle handguard, with A1 flash hider & charging handle, slickside bolt carrier assembly, in *Very Good* condition.

Sold Individually.

Own a part of history with this collectible Colt Manufactured upper assembly!
M16 upper receiver with numbered rear sight knob and raised arrow directional markings.
Early 604 "MP" (magnetic particle) marked barrel with "C" (chrome bore) marking 1 inch back from muzzle.
These were mated to a slabside receiver with no forward assist or casing deflector.
Possible years of production on this assembly are between 1967 and 1969.
These receiver assemblies have the Colt proof marks on the front right side of the receiver.
Chrome lined bore is in *Very Good* condition.
These were among the first Colt production M16's with the chrome lined bore.
Black polymer triangle type handguards are in *Very Good* condition, with some scratches.
Includes proper M16A1 charging handle, slick side bolt carrier assembly and A1 type flash hider.
Lower assembly, FCG parts and buttstock are NOT included.
Front sling swivel is NOT included.

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

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.