Colt Upper Receiver M4 / AR-15 5.56 / .223 Rem
Colt Manufacturing M4 Upper receiver assembly. Engraved white T marks. No barrel, bolt carrier group, or charging handle. Includes M4 feed ramp upper receiver, forward assist, dust cover. Black Mil-Spec anodized. No “C” stamp and no M4 mark on front of Picatinny rail. These are new production Colt.
Manufacturer’s Part Number: SP63528
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