EPC-9 Builder Set w/ 7.3" ATLAS R-ONE Handguard - Cavern Flecktarn Camo

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This is a controlled item and requires shipping to an authorized and valid Federal Firearms License (FFL) holder. All items placed on order with this item will be shipped together to the FFL. If you are ordering non-FFL items that you would like shipped directly to you, please place them on a separate order.

If you have a copy of the FFL, please email it to ffl@aeroprecisionusa.com

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There will be a 30% restocking fee for all controlled items returned due to a failed background check or a denied underage purchase.

Federal law requires that you be 21 years of age or older to purchase a stripped receiver or frame. If a frame or receiver can only be made into a long gun (rifle or shotgun), it is still a frame or receiver not a handgun or long gun. However, they still are "firearms" by definition, and subject to the same GCA limitations as any other firearms. See Section 921(a)(3)(b). 18 U.S.C. Section 922(b)(1) makes it unlawful for a licensee to sell any firearm other than a shotgun or rifle to any person under the age of 21.

The December Builder Sets are here to finish off the year strong. This double feature brings two different colorways to the classic flecktarn camouflage pattern that is the basis for many disruptive camouflage patterns across the world.

A Cavern Flektarn finish by Nevada Cerakote brings a darker colorway to Flecktarn giving it a much more subdued look. The Arctic Flecktarn finish by Weichel Performance Coatings takes this same pattern and gives it a winter camouflage colorway. Whether you are building a rifle for your next sub-zero hunt, or just want something that stands out from the rest-this month's release has something for you.

This builder set includes the finished pieces you need to assemble your own Cavern Flecktarn Camo 9mm EPC Build. The set includes an EPC-9 Threaded Upper Receiver, EPC-9 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!


  • EPC-9 Threaded Upper Receiver finished in Cavern Flecktarn Camo. Upper receiver is assembled and includes the last round bolt hold open.
  • 7.3" ATLAS S-ONE M-LOK Handguards finished in Cavern Flecktarn Camo (Mounting Kit Included)
  • EPC-9 Lower Receiver finished in Cavern Flecktarn Camo

These December 2022 Builder Sets are available in the following configurations:

  • EPC-9 (EPC) 7.3" ATLAS R-ONE Handguard
  • M4E1 (AR15) 9.3" Enhanced Handguard
  • M4E1 (AR15) 15" Enhanced Handguard
  • M4E1 (AR15) 9.3" ATLAS S-ONE Threaded
  • M4E1 (AR15) 15" ATLAS S-ONE Threaded
  • M4E1 (AR15) 9.3" ATLAS R-ONE Threaded
  • M4E1 (AR15) 15" ATLAS R-ONE Threaded
  • M5E1 (.308) 15" Enhanced Handguard
  • M5 (.308) 15" ATLAS S-ONE Threaded
  • M5 (.308) 15" ATLAS R-ONE Threaded

Furniture Sets are available in the following configurations:

  • Magpul MOE Grip & SL Stock
  • Magpul MOE Grip & SL-S Stock
  • Magpul MOE Grip & PRS GEN3 Stock
Shipping to FFL Dealer RequiredYes
Made In America?Yes
Select Your FinishCavern Flecktarn Camo
Weight(s)25.02 oz
Other Features-