Custom Jacob Grey Billet Aluminum Receiver Set


Custom Jacob Grey Precision (M4) Billet Upper and Lower Receiver Set – CNC Machined Aluminum.  This is 100% Billet Machined from a solid block of 7075 -T651 Aircraft Aluminum  –  NOT forged or forged/billet!  Machined to the tightest of tolerances on 5 axis Aerospace machines.  Designed to provide a more rigid shooting platform than other receivers, while still saving as much weight as possible.  Finished at the factory in Anodized Black.  You can select custom Cerakote finishes at checkout.

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Custom Jacob Grey Billet Aluminum Receiver Set


  • Milled on Aerospace CNC machines
  • billet 7075-T651 Aircraft Aluminum
  • Expanded trigger guard
  • Ambidextrous safety markings
  • 6-32 threaded bolt catch screw
  • Forward Assist delete
  • Full picatinny rail
  • M4 Feedramp cut
  • Anodized Matte Black


  • Caliber:  Multi (will accept any upper and/or caliber designed for the AR-15 platform)
  • Magazine: Accepts any standard MIL-SPEC AR-15 magazine
  • Precision broached magazine well with beveled feed lips
  • Caliber marking of “Multi” so it can be used with many different caliber uppers
  • Compatible with all standard AR-15 components and magazines and most aftermarket parts
  • Integrated large opening “winter” trigger guard
  • Manufactured to MILSPEC on state of the art CNC equipment for consistent quality parts and exacting tolerances


  • Made in America
  • Requires shipment to licensed FFL dealer.  This is a serialized item considered to be a firearm by BATFE.  All BATFE, GCA & NFA rules apply!
  • This item can be custom ordered to be finished in the following cerakote colors:
    • OD Green (+$40)
    • Burnt Bronze (+$40)
    • Gun Metal Grey (+$40)
    • Tungsten (+$40)
    • Graphite Black (+$40)

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Additional information

Weight 1.2500000 lbs
Dimensions 0.0000000 × 0.0000000 × 0.0000000 in

Anodized Black, Burnt Bronze, Desert Sand, Flat dark earth, Graphite Black, Gun Metal Grey, OD Green, Tungsten


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