SOLD FOR: $1525
Make: Colt Upper, Barrel & BCG
Caliber: 5.56x45mm NATO
Barrel Length: 12″, Pencil-profile (0.625″ at the gas-block journal)
Action Type: Carbine-Length Gas Operated Semi-Auto Upper Receiver
Markings: The A2 upper receiver is marked “C / MB” on the right in front of the rear sight assembly. The right of the front sight base is marked “X(RI)1”. The top of the barrel is marked “C MP CB” in front of the FSB. The right of the carrier is marked “C”, the bolt is marked “MPC”.
Handguard Configuration & Condition: The handguard is a two-piece black polymer carbine handguard with heat shields attached with a delta-ring. There are a few nicks and scuffs. Otherwise, there is no notable wear.
Sights / Optics: The front sight is a post adjustable for elevation in the front sight base. The rear sight is an A2-style dual-aperture assembly adjustable for windage and elevation.
Type of Finish: Phosphate and Anodized Aluminum
Finish Originality: Original
Bore Condition: The bore is bright and the rifling is sharp. There is no erosion in the bore.
Overall Condition: This upper assembly retains approximately 97% of its metal finish. There is no notable damage, only minor operational wear and light handling marks. The markings are clear. Overall, this upper assembly is in Fine-Excellent condition.
BCG: AR-15 Profile Carrier, chrome-lined bolt channel and gas key, staked gas key.
Our Assessment: This is a complete upper receiver assembly which is in a pseudo-733 configuration. The Colt 733 is an iconic carbine, perhaps best known for its appearances in the epic bank shootout scene from the movie “Heat” and in the hands of Master Sergeant Gary Gordon whose exploits were depicted in “Blackhawk Down”. The original 733 had a C7 upper, essentially an A1 upper receiver which had a shell deflector and an 11.5″ pencil-profile barrel. This upper receiver has been built with an A2 upper receiver, similar to the one seen in the movie “Blackhawk Down”, and a 12″ barrel fitted with an A2 flash-hider. The upper is in great shape, appearing to have seen limited use. Please see our photos and good luck!