Aero Precision M4E1 Threaded Complete Upper Receiver 5.56 NATO 14.5 in Barrel Government Profile 1-7 Twist 1/2x28 Thread 12 in ATLAS S-ONE M-LOK

Name: Aero Precision M4E1 Threaded Complete Upper Receiver 5.56 NATO 14.5 in Barrel Government Profile 1-7 Twist 1/2x28 Thread 12 in ATLAS S-ONE M-LOK
Brand: Aero Precision
SKU: APAR700304M68
Price: 654.99 USD
Availability: OutOfStock

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Overview

The Aero Precision M4E1 Threaded Complete Upper Receiver is designed for the AR-15 platform, featuring a 14.5-inch barrel chambered in 5.56 NATO. This upper receiver is complete and ready to install, with a 1:7 twist rate that stabilizes a wide range of bullet weights, making it versatile for various ammunition types. The 1/2x28 thread pitch allows for easy attachment of muzzle devices, which is essential for customizing your build. This upper is commonly found in shorter, maneuverable builds ideal for tactical applications and home defense.

Specifications

MPNAPAR700304M68

Twist Rate1:7

Receiver TypeM4E1

AssemblyComplete

Thread Pitch1/2x28

Barrel Length14.5

Caliber5.56 NATO

PlatformAR-15

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Aero Precision M4E1 Threaded Complete Upper Receiver 5.56 NATO 14.5 in Barrel Government Profile 1-7 Twist 1/2x28 Thread 12 in ATLAS S-ONE M-LOK

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Prices checked Oct 6, 2026

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$655

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Price and stock

The Aero Precision M4E1 Threaded Complete Upper Receiver 5.56 NATO 14.5 in Barrel Government Profile 1-7 Twist 1/2x28 Thread 12 in ATLAS S-ONE M-LOK was out of stock everywhere we track for all of September 2026, and today the one retailer we track is out of stock. Listed prices start at $654.99 at Optics Planet for when it comes back.

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Prices checked Oct 6, 2026 · refreshed daily across 37 retailers