I have a used in excellent condition factory Colt 6921HB M16 upper. Does not include the bolt,carrier and charging handle. Colt M4 A3 Flat top Upper receiver Marked with a "C" and a keyhole. Wits RAS number on top in white. Colt factory carry handle. Colt 14.5" heavy under the handguards M4 barrel with A2 flashider. Barrel marked "C MP" 5.56 NATO 1/7. It has the factory Colt side sling adaptor and Colt M4 handguards. It has a total of 50 rounds fired through it. I would rate it 98%
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$550.00 shipped **Sold**
Or $700.00 shipped Complete with Factory Colt M16 Carrier,Bolt and CH.