Receiver PartsAero PrecisionSold by Brownells

Aero Precision

Epc-9 9mm/40 S&W Carbine Complete Lower W/A2 Grip & M4 Stock - Epc-9 Carbine Complete Lower W/A2 Grip & M4 Stock Black

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

Aero Precision

EPC-9 complete lower receiver for

Includes A2

Pistol grip and M4 stock

Lower Parts

Kit, enhanced buffer tube, buffer,

Threaded Bolt

Catch pin supports easier installation

Integrated Enlarged

Trigger guard adds a more

$384.99
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SKU: 100049032

Overview

Built as a complete lower for an AR9-style carbine, this receiver assembly gives builders a ready starting point for a 9mm or .40 S&W setup. It arrives with the A2 pistol grip, M4 stock, lower parts kit, enhanced buffer tube, EPC 7.7 oz buffer, M5 carbine buffer spring, and castle nut/end plate already installed, reducing the amount of separate assembly work. Aero Precision also includes practical lower-receiver features such as a threaded bolt catch pin, an integrated enlarged trigger guard, and a threaded takedown pin detent recess for easier installation. For hunters and shooters planning a dedicated pistol-caliber carbine, it offers a straightforward foundation without the need to source each component individually.

Why Hunters Choose the Aero Precision

Complete Lower

Receiver provides a ready base

Includes A2

Pistol grip and M4 stock

Ships Lower

Lower parts kit, enhanced buffer

Threaded Bolt

Catch pin is designed for

Integrated Enlarged

Trigger guard adds a more

Key Features

  • Aero Precision EPC-9 complete lower receiver for a custom AR9 build
  • Includes A2 pistol grip and M4 stock
  • Lower parts kit, enhanced buffer tube, buffer, spring, castle nut, and end plate are installed
  • Threaded bolt catch pin supports easier installation
  • Integrated enlarged trigger guard adds a more rugged platform
  • Threaded takedown pin detent recess accepts a detent and spring with a single 4-40 set screw

Best Used For

  • Hunters building a custom AR9-style carbine with a complete lower already assembled
  • Users who want an EPC-9 lower receiver with included A2 grip and M4 stock
  • Builders looking for a straightforward starting point for a 9mm or .40 S&W carbine setup
  • Those who prefer installed lower parts, buffer system, and stock components in one package
  • Shooters wanting a lower receiver with enlarged trigger guard and threaded pin features

Pros

  • Complete lower receiver provides a ready base for a custom AR9 build.
  • Includes A2 pistol grip and M4 stock already installed.
  • Ships with lower parts kit, enhanced buffer tube, buffer, spring, castle nut, and end plate.
  • Threaded bolt catch pin is designed for easier installation.
  • Integrated enlarged trigger guard adds a more rugged platform.
  • Threaded takedown pin detent recess supports simpler detent and spring installation.

Considerations & Trade-offs

  • Built as a complete lower, so it’s suited to builders who want a more finished starting point rather than sourcing each component separately.
  • Configured with an A2 pistol grip and M4 stock, which may not match users planning a different stock or grip setup.
  • The included EPC 7.7oz buffer and M5 carbine buffer spring are part of the package, so this lower is set up around that configuration rather than a bare receiver.
  • It is presented as a base for a custom AR9 build, so final compatibility and performance depend on the rest of the build components.

Suggested Comparisons

  • AR-9 lower receiver assemblies
  • Complete lower receivers
  • Carbine-stock lower receiver setups
  • 9mm/.40 S&W AR platform components

Suggested Accessories

  • Lower receiver parts kit
  • Carbine buffer spring
  • Castle nut and end plate
  • A2 pistol grip

Frequently Asked Questions

What comes included with the EPC-9 complete lower receiver?

The listed package includes the EPC-9 lower receiver, A2 pistol grip, M4 stock, lower parts kit, enhanced buffer tube, EPC 7.7oz buffer, M5 carbine buffer spring, and castle nut/end plate. The description says these parts are installed.

Is this lower intended for a custom AR9 build?

Yes. The product description states that the Aero Precision EPC-9 Complete Lower Receiver is a base for a custom AR9 build.

What receiver features are called out in the product data?

The listed features are a threaded bolt catch pin for easier installation, an integrated enlarged trigger guard, and a threaded takedown pin detent recess that allows installation of a detent and spring with a single 4-40 set screw.

Does the product data specify the exact compatibility beyond 9mm/.40 S&W?

No. The provided title identifies it as an EPC-9 9mm/.40 S&W carbine complete lower, but no additional compatibility details are given in the source data.

Are the material, dimensions, or weight of the lower receiver listed?

No. The provided information does not include material, dimensions, or weight for the lower receiver or the included components.