Colt 604 M16 Parts Set, 20" Barrel, A1 Birdcage, A1 Buttstock & Pistol Grip, Grey Finish, 1970-1971 Production, 5.56 NATO *Good*

Colt 604 Parts Set, 20" Pencil Profile Barrel, A1 bircage flash hider, triangle handguards, M16A1 style buttstock and pistol grip, early grey finish, 5.56X45 NATO, in *Good* condition.

Sold Individually.

Own a part of history with this early Colt Kit!
Possible years of production on this assembly are between 1970 and 1971.
Complete less the lower receiver.
M16A1 buttstock assembly and pistol grip.
Triangle handguards with straight barrel nut.
Gray anodized receiver with "CM" manufacturer markings.
Numbered rear sight dail with raised arrow directional marker on the receiver.
Colt forge markings on front right side of receiver.
Front sight is circle post, with front sling swivel.
Barrel is marked "C MP B" for Colt Magnetic Particle Chrome Bore.
Chrome lined bore in in Good condition with light pitting.
Later style forged front sight base is "C" and Bell marked, with drain hole.
Early style unmarked slickside Colt bolt carrier has early style staking on the gas key.
Bolt is marked for magnetic partical inspection.
Small hole front pivot pin.
Includes original OD green canvas sling (as pictured).
Slabside upper receiver, forged front sight base with the drain hole, and A1 birdcage flash hider.

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.