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Aero Precision

Aero Precision M4E1 Gun Metal Grain 10.3" Atlas R-One

Product Code : apcs100851

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Mfg Item #: apcs100851

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The first of the 2023 Builder Set lineup is here. This edition features a Gunmetal Grain Cerakote finish expertly applied by Blowndeadline. This set will look great built out for almost any application and will certainly stand out from nearly every other finish out there.

This builder set includes the finished pieces you need to assemble your own Gunmetal Grain M4E1 Rifle. The set includes an M4E1 Threaded Upper Receiver, M4E1 Lower Receiver and our ATLAS R-ONE Handguard all with this exclusive finish. This finish is available one time only and in limited quantities, so get it while you can!


  • M4E1 Threaded Upper Receiver finished in Gunmetal Grain. Upper receiver is assembled and includes the forward assist, dust cover and barrel nut.
  • 10.3" ATLAS R-ONE M-LOK Handguards finished in Gunmetal Grain (Mounting Kit Included)
  • M4E1 Lower Receiver finished in Gunmetal Grain

Determined at checkout.