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Aero Precision

Epc-9 9mm/40 S&W Assembled Upper Receiver W/Lrbho - Epc-9 9mm/40 S&W Assembled Upper Receiver W/Lrbho Black

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

Assembled Epc-9

Enhanced Upper Receiver for AR9

Includes Last

Round bolt hold open mechanism

Compatible Aero

Aero Enhanced and Quantum handguards

One-piece Design

Combines handguard mount and upper

Uses Only

Eight screws for free-floated handguard

$204.99
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SKU: 100049004

Overview

Built for AR9 builds, this upper receiver combines the receiver and handguard mounting platform into a single one-piece design for a streamlined setup. It includes a last round bolt hold open mechanism and is compatible with Aero’s Enhanced and Quantum handguards, giving builders a solid option for a free-floated handguard arrangement. The design reduces the number of parts needed for installation to eight screws, which may appeal to users looking for a simpler assembly process. For hunters and shooters setting up a 9mm or .40 S&W platform, it offers a purpose-driven foundation without unnecessary complexity.

Why Hunters Choose the Aero Precision

Includes Last

Round bolt hold open mechanism

Compatible Aero

Aero Enhanced and Quantum handguards

One-piece Design

Combines the handguard mounting platform

Uses Only

Eight screws for free-floated handguard

Shared Forging

For the mounting surface and

Key Features

  • Assembled EPC-9 Enhanced Upper Receiver for AR9 builds
  • Includes last round bolt hold open mechanism
  • Compatible with Aero Enhanced and Quantum handguards
  • One-piece design combines handguard mount and upper receiver
  • Uses only eight screws for free-floated handguard mounting
  • Black finish

Best Used For

  • AR9 builders wanting an assembled upper with last-round bolt hold open functionality
  • Shooters planning a 9mm or .40 S&W platform using Aero Enhanced or Quantum handguards
  • Users seeking a one-piece upper and handguard mounting platform for a streamlined build
  • Builders prioritizing a rugged handguard mounting solution with fewer assembly screws
  • Hunters and range users assembling a compact pistol-caliber carbine setup

Specifications

AssembledYes
Caliber9mm/40 S&W
ColorBlack
Country Of OriginAero Precision
DesignOne-piece design
Free Floated Handguard CompatibilityYes
Handguard CompatibilityAero Enhanced and Quantum handguards
Handguard Mounting PlatformIntegrated with upper receiver
Handguard Mounting Screws8
Last Round Bolt Hold OpenYes
ModelEPC-9 Enhanced Upper Receiver
Upper ReceiverIncluded

Pros

  • Includes a last round bolt hold open mechanism for AR9 builds.
  • Compatible with Aero Enhanced and Quantum handguards.
  • One-piece design combines the handguard mounting platform and upper receiver.
  • Uses only eight screws for free-floated handguard mounting.
  • Shared forging for the mounting surface and upper receiver adds structural continuity.

Considerations & Trade-offs

  • Compatibility is centered on Aero's Enhanced and Quantum handguards, so it may not suit builds that rely on other handguard systems.
  • The one-piece upper and handguard mounting platform design is purpose-built for a specific setup, which can limit flexibility if you plan to reconfigure the build later.
  • This is an assembled upper receiver for AR9 use; it is not a complete firearm and requires the rest of the build components to be selected separately.
  • The included last round bolt hold open mechanism adds functionality, but it also means there are more integrated parts to account for during assembly and maintenance.

Suggested Comparisons

  • AR9 upper receivers
  • 9mm/40 S&W upper assemblies
  • Enhanced handguard mounting systems
  • AR-pattern pistol-caliber carbine components

Suggested Accessories

  • Handguard
  • Upper receiver assembly
  • AR9 magazine
  • Optic mount

Frequently Asked Questions

What type of build is this upper receiver intended for?

It is described as an EPC-9 Enhanced Upper Receiver for an AR9 build.

Does this upper receiver include last round bolt hold open?

Yes. The product description states that it includes a last round bolt hold open mechanism.

What handguards is it compatible with?

It is described as compatible with Aero Precision's Enhanced and Quantum handguards.

What is the main design feature of this upper receiver?

The description says it uses a one-piece design that combines the handguard mounting platform with the upper receiver itself.

How is the handguard mounted on this upper receiver?

The product description says the free-floated handguard mounting system uses 8 screws.