Receiver PartsAero PrecisionSold by Brownells

Aero Precision

5.56mm Complete Upper Receiver W/Brn Bolt Carrier Group - 5.56mm 16'''' Bbl M4 Comp Uppr Rcvr W/Brn Bcg & Charge Handle

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

Complete Ar15

Upper receiver assembly from Aero

16-inch 5.56

Pinned front sight base

Carbine-length Gas

System for a standard AR

M4-style Handguard

Included

Standard A2

Flash hider installed

$548.99
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: 100042977

Overview

Built as a complete upper receiver assembly for an AR15-pattern rifle, this configuration provides a ready-to-install foundation for a 5.56 setup. It combines a 16" 5.56 CMV carbine-length barrel with a pinned front sight base, M4 style handguard, standard A2 flash hider, BRN bolt carrier group with black nitride finish, and a standard aluminum charging handle. The result is a straightforward, traditional upper suited to hunters and shooters who want a familiar layout with minimal extra components. Its carbine-length gas system and standard receiver format keep the setup conventional, though the fixed front sight base and basic handguard may not suit every preference.

Why Hunters Choose the Aero Precision

Complete Upper

Receiver includes bolt carrier group

16-inch 5.56

Pinned front sight base and

Standard Ar15

M4 style handguard for familiar

Standard A2

Flash hider included from the

Brn Bolt

Carrier group features a black

Key Features

  • Complete AR15 upper receiver assembly from Aero Precision
  • 16-inch 5.56 CMV barrel with pinned front sight base
  • Carbine-length gas system for a standard AR setup
  • M4-style handguard included
  • Standard A2 flash hider installed
  • Includes BRN bolt carrier group with black nitride finish
  • Standard AR-15 charging handle with matte black anodized finish

Best Used For

  • Hunters building a 5.56 AR upper with a standard AR-15 configuration and included charging handle
  • Users wanting a complete upper with pinned front sight base and M4 style handguard
  • Shooters looking for a carbine-length gas system setup for a general-purpose rifle build
  • Owners assembling an Aero Precision upper with included BRN bolt carrier group

Specifications

Barrel16" 5.56 CMV Carbine Length Barrel w/ Pinned FSB
Barrel Length16"
Blade FinishBlack Nitride Finish
Bolt Carrier GroupBRN Bolt Carrier Group (SKU 078102001) w/ Black Nitride Finish
Caliber5.56mm
Charging HandleStandard AR-15 Charging Handle machined in aluminum w/ matte black anodized finish
Charging Handle FinishMatte Black Anodized Finish
Charging Handle MaterialAluminum
Gas SystemCarbine Length Gas System
HandguardM4 Style Handguard
Muzzle DeviceStandard A2 Flash Hider
Pinned Front Sight BaseYes
UpperStandard AR15 Upper Receiver

Pros

  • Complete upper receiver includes bolt carrier group and charging handle for a ready-to-build setup.
  • 16-inch 5.56 CMV barrel with pinned front sight base and carbine-length gas system.
  • Standard AR15 upper receiver paired with M4 style handguard for familiar handling.
  • Standard A2 flash hider included from the factory.
  • BRN bolt carrier group features a black nitride finish.
  • Charging handle is aluminum with a matte black anodized finish.

Considerations & Trade-offs

  • Carbine-length gas system and pinned front sight base give it a more traditional setup, which may be less flexible than some modern free-float configurations.
  • The M4 style handguard is a straightforward, utilitarian choice, but it does not offer the accessory space or modularity of more contemporary handguard designs.
  • The included standard A2 flash hider is a basic muzzle device, so users wanting a different setup will need to plan for a separate change.
  • The upper ships with a standard AR-15 charging handle and BRN bolt carrier group, which is practical, but not a premium upgraded control package.

Suggested Comparisons

  • AR-15 complete upper receivers
  • 5.56 NATO upper assemblies
  • carbine-length upper receiver groups
  • M4-style handguard uppers

Suggested Accessories

  • AR-15 lower receiver
  • Magazines
  • Optic mount
  • Cleaning kit

Frequently Asked Questions

What comes included with this complete upper receiver assembly?

According to the product data, it includes a standard AR15 upper receiver, a 16" 5.56 CMV carbine-length barrel with pinned FSB, M4 style handguard, carbine-length gas system, standard A2 flash hider, BRN bolt carrier group with black nitride finish, and a standard AR-15 charging handle.

Is this upper set up for 5.56 ammunition?

Yes. The title and product description both identify it as a 5.56mm complete upper receiver with a 16" 5.56 barrel.

What type of gas system does this upper use?

The listed gas system is carbine length.

Does this upper have a pinned front sight base?

Yes. The barrel is described as a 16" 5.56 CMV carbine-length barrel with pinned FSB.

Who is the manufacturer listed for this upper?

The manufacturer listed in the product data is Aero Precision.