Colt 601 M16 Upper Assembly 1959-1963, 20" Barrel, 5.56X45 NATO, A1 Flash Hider & Bolt Carrier, *Good*

Colt Model 601 Upper Receiver Assembly, 20" Barrel, 5.56x45 NATO, 1959-1963, Black triangle Handguard, with A1 flash hider, charging handle and bolt carrier assembly, No front sling swivel, in *Good* condition.

Sold Individually.

Own a part of history with this reliable, Colt Manufactured upper assembly!
Early type with non-numbered rear sight knob and no directional markings on receiver.
These were mated to a slab side receiver with no forward assist or casing deflector.
Possible years of production on this assembly are between 1959 and 1963.
These receiver assemblies have the Colt proof marks on the front right side of the receiver.
Rifling is in *Good* condition.
Black polymer triangle type handguards are in *Good* condition, with some scratches and marring.
Includes M16A1 charging handle, bolt carrier assembly and A1 type flash hider.
Missing the front sling swivel.
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.
- Early cast type front sight base.
- Fixed rear sight bridge with L-shape sights and windage adjustment. 
- M16 style carry handle upper, with large square dust cover, early bend gas tube.
- 20" barrel with A1 type "Birdcage" flash hider.

Parts must be inspected and tested by qualified and competent gunsmiths or armorers 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.