Aero Precision EPC-9 - Threaded Upper Receiver w/ LRBHO

Aero Precision's 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.

For 9mm and .40 S&W

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