American Made Parts for American Rifle Builders

Aero Precision

Aero Precision EPC-9 - Threaded Upper Receiver w/ LRBHO - FDE Cerakote (FREE SHIPPING)

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The EPC-9 upper receiver is the perfect addition to any AR9 build. Including a last round bolt hold open mechanism and compatible with most standard AR15 barrel nut and handguard combinations this upper receiver will help take your pistol caliber build to the next level.

Features and Specifications:

  • Last round bolt hold open mechanism
  • Accepts most AR15 compatible barrel nuts and handguards
  • Dimple above threads to allow for proper handguard timing
  • Standard AR15 takedown/pivot pin lug pattern
  • Machined from custom forged 7075-T6 aluminum
  • Laser engraved T-marks


  • Upper Receiver
  • Pre-installed last round bolt hold open assembly

NOTE: The EPC last round bolt hold open is ONLY compatible with appropriate GLOCK® pattern magazines.