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Colt® - M4 Upper Receiver Assembly - Cage Code
Colt® - M4 Upper Receiver Assembly - Cage Code

Colt® - M4 Upper Receiver Assembly - Cage Code

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Your Price: $180.00
Part Number: SP63528
Availability: Out of Stock.
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Hey Clone Guys. Now is your chance to get that clone correct upper for your build! The Colt® M4 Upper Receiver Assembly - Cage Code Marked.

Please Note: Forge marks and engraving/dot stamping may differ from what is pictured. Throughout the years we have received a few different forge marks on Colt Manufacturing® receivers. The way the Cage Code is engraved may also vary. There is no rhyme or reason as to why some are engraved and others are micro dot stamped. We verify the receivers are cage code marked once they arrive, but don't separate out the two different markings. Which ever forge marks/engraving/stamping you are shipped is final. 


  • Manufacturer - Colt®
  • Cage Code Marked
  • 1913 Mil-Spec Top Rail
  • Laser Etched T-Markings
  • For Use With M4 Barrel Extension
  • Material - 7076 T5 Aluminum
  • External Finish - Hard Coat Anodized per Mil-A-8625F, Type III, Class 2
  • Internal Finish - Dry Film Lube per Mil-Spec
  • Weight - 8.6 oz

What's Included

  1. Complete Colt® Upper Receiver Assembly


DISCLAIMER: "Colt Manufacturing and Colt" is a federally registered trademark of Colt's Manufacturing Company, LLC. Neither Classified Defense, nor this site is affiliated in any manner with, or otherwise endorsed by Colt's Manufacturing Company, LLC. The use of "Colt Manufacturing and Colt" on this website is merely to advertise the sale of tools and/or part used on Colt's Manufacturing Company, LLC. components.

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