Aero Precision All Aero Precision upper receivers

Aero Precision M4E1 Threaded Complete Upper Receiver 5.56 16in Mid-Length Barrel 1-7 Twist 15in ATLAS S-ONE Handguard A2 Flash Hider Cerakote OD Green

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Aero Precision

Overview

The Aero Precision M4E1 Threaded Complete Upper Receiver features a 16-inch mid-length barrel chambered in 5.56 NATO, designed to offer enhanced reliability and reduced recoil for a smoother shooting experience. With a 1:7 twist rate, it is optimized for stabilizing a wide range of bullet weights, making it versatile for various applications. This upper receiver is commonly found in builds that prioritize a mid-length gas system, ideal for those looking to balance performance and comfort in their AR-15 configurations.

Specifications

MPNAPAR700064M7

Barrel Length16

Caliber5.56 NATO

Twist Rate1:7

PlatformAR-15

AssemblyComplete

ColorOD Green

Gas System LengthMid-Length

Receiver TypeM4E1

Thread Pitch1/2x28

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Aero Precision M4E1 Threaded Complete Upper Receiver 5.56 16in Mid-Length Barrel 1-7 Twist 15in ATLAS S-ONE Handguard A2 Flash Hider Cerakote OD Green

Available Merchants

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Build history on GunPartPicker

Builders have been adding the Aero Precision M4E1 Threaded Complete Upper Receiver 5.56 16in Mid-Length Barrel 1-7 Twist 15in ATLAS S-ONE Handguard A2 Flash Hider Cerakote OD Green to their builds on GunPartPicker since February 2026. All time, it ranks #917 of the 1,654 upper receivers builders have added.

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Updated Oct 3, 2026 · from real builds on GunPartPicker