Colt Forged M4 Upper Receiver Assembly


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‘M4’ marked upper from Cerroforge (keyhole forge mark), no CAGE code or dot matrix marking

(1 customer review)

8 in stock

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Colt Forged M4 Upper Receiver Assembly

Built to the correct military specifications

Note: These are ‘M4’ marked and are Cerroforge ‘keyhole’ marked. These do not have a CAGE code or dot matrix marking.


  • Precision machined to correct Mil-Specs from 7075 T6 Forgings extension, providing the user with superior strength when dropped or when mortaring malfunction clearance drills.
  • Fully Assembled with forward assist, and ejection port cover
  • Mil-Std 1913 Rail for mounting optics and accessories
  • Machined for use with barrels that use an M4 barrel extension
  • Laser etched T-markings for addressing the remounting of optics
  • Includes Mil-Spec Forward Assist with heat treated tool steel pawl, with press fit and pinned cap
  • Hard Coat Anodized per Mil-A-8625F, Type III, Class2
  • Dry Film Lube on interior bore per Mil-Specs

1 review for Colt Forged M4 Upper Receiver Assembly

  1. Aaron (verified owner)

    Perfect quality, you can’t go wrong with one of these. Perfect fit and finish, as well as fast shipping from rooftop as always.

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