Receiver PartsAero PrecisionSold by Brownells

Aero Precision

Aero Ar-15 Assembled Upper 5.56mm Build Kits - Build Kit 5.56mm Assembled Upper 16'''' Carbine 12'''' Hg Black

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

Includes Aero

Forward assist and ejection port

Laser-engraved T-marks

On the Picatinny rail for

M4 Feed

Cuts are built into the

Bundle Includes

Three core components: receiver, barrel,

Designed As

Upper bundle for building a

$462.29
View on Brownells

You'll be taken to Brownells to complete your purchase.

Hunter's Outpost earns a commission from affiliate links at no extra cost to you.

SKU: 100042979

Overview

This upper bundle is built for hunters and shooters who want a straightforward starting point for a custom AR-15 setup without paying for parts they may not use. It centers on the core components needed to begin an upper build: the receiver, barrel, and an extended M-LOKA handguard, with the forward assist and ejection port cover already installed. The flattop, M4-type upper receiver includes laser-engraved T-marks on the Picatinny rail and M4 feed cuts inside. For those assembling a rifle around specific preferences, it offers a practical foundation while leaving the remaining choices to the builder.

Why Hunters Choose the Aero Precision

Includes Three

Core upper components needed for

Comes Aero's

Aero's mil-spec, flattop, M4-type upper

Forward Assist

Ejection port cover are already

Laser-engraved T-marks

On the Picatinny rail support

M4 Feed

Cuts are built into the

Key Features

  • Includes Aero Precision mil-spec, flattop, M4-type upper receiver with forward assist and ejection port cover installed.
  • Features laser-engraved T-marks on the Picatinny rail for optic and accessory reference.
  • M4 feed cuts are built into the upper receiver.
  • Bundle includes the three core components: receiver, barrel, and extended M-LOKA handguard.
  • Designed as an upper bundle for building a custom AR-15 rifle setup.
  • Product is listed as a 5.56mm assembled upper build kit with a 16-inch carbine configuration.

Best Used For

  • For builders assembling a custom AR-15 upper around selected components
  • For hunters who want a mil-spec flattop upper with installed forward assist and ejection port cover
  • For users planning a 5.56mm carbine setup with an extended M-LOKA handguard
  • For shooters who prefer starting with core upper components instead of buying a complete rifle
  • For anyone organizing a build with fewer unused parts left over

Specifications

Build KitBuild Kit
Caliber5.56mm
ColorBlack
Ejection Port CoverIncluded, installed
Feed CutsM4 feed cuts
Forward AssistIncluded, installed
Handguardextended M-LOKA(R) handguard
Handguard Length12 in
RailPicatinny rail
Receivermil-spec, flattop, M4-type upper receiver
T Markslaser-engraved
Upper TypeAssembled Upper

Pros

  • Includes the three core upper components needed for a custom AR-15 build.
  • Comes with Aero's mil-spec, flattop, M4-type upper receiver.
  • Forward assist and ejection port cover are already installed.
  • Laser-engraved T-marks on the Picatinny rail support optic setup.
  • M4 feed cuts are built into the upper receiver.
  • Uses an extended M-LOKA handguard for added setup flexibility.

Considerations & Trade-offs

  • This is an upper bundle, not a complete rifle, so additional components are still required to finish the build.
  • The package is centered on the receiver, barrel, and extended M-LOK handguard; it does not include the rest of the upper assembly or lower receiver parts.
  • The description emphasizes a mil-spec, flattop, M4-type upper receiver with forward assist and ejection port cover already installed, which may not suit builds looking for a different receiver style.
  • Because the listing is focused on core components, buyers should verify compatibility with the specific parts they plan to add separately.

Suggested Comparisons

  • AR-15 upper receivers
  • AR-15 barrel assemblies
  • AR-15 handguards

Suggested Accessories

  • Upper receiver
  • Barrel
  • M-LOK handguard
  • Forward assist assembly

Frequently Asked Questions

What comes included in this Aero Precision AR-15 upper build kit?

The description says the bundle includes the three core components for the upper: the receiver, barrel, and an extended M-LOKA handguard. It also notes the upper receiver comes with the forward assist and ejection port cover already installed.

Is this a complete rifle?

No. The product is described as an upper bundle for building a custom rifle, not a complete rifle. The remaining components are purchased separately.

What type of upper receiver is included?

The long description says it comes with Aero's mil-spec, flattop, M4-type upper receiver.

Does the upper receiver have rail markings or feed cuts?

Yes. The description states it has laser-engraved T-marks on the Picatinny rail and M4 feed cuts inside.

What caliber is this build kit for?

The product title identifies it as a 5.56mm build kit.