Aero Precision M4E1 Threaded .223 Wylde Complete Upper Receiver 18in Wylde SS QPQ Rifle Length 1-8 Twist A2 Flash Hider 15 in M-LOK ATLAS R-ONE

Name: Aero Precision M4E1 Threaded .223 Wylde Complete Upper Receiver 18in Wylde SS QPQ Rifle Length 1-8 Twist A2 Flash Hider 15 in M-LOK ATLAS R-ONE
Brand: Aero Precision
SKU: APAR700705M73
Price: 534.99 USD
Availability: OutOfStock

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Aero Precision M4E1 Threaded .223 Wylde Complete Upper Receiver 18in Wylde SS QPQ Rifle Length 1-8 Twist A2 Flash Hider 15 in M-LOK ATLAS R-ONE - Upper Receiver for AR-15 - view 1

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Aero Precision

Overview

The Aero Precision M4E1 Threaded .223 Wylde Complete Upper Receiver features an 18-inch barrel and a rifle-length gas system, making it well-suited for precision shooting and versatility with both .223 Remington and 5.56 NATO ammunition. With a twist rate of 1:8, this upper receiver stabilizes a range of bullet weights, enhancing accuracy for various applications. This upper is commonly seen in builds optimized for long-range shooting and tactical applications, where the .223 Wylde caliber provides flexibility and reliability.

Specifications

MPNAPAR700705M73

Gas System LengthRifle

PlatformAR-15

Caliber.223 Wylde

AssemblyComplete

Receiver TypeM4E1

Twist Rate1:8

Barrel Length18

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Aero Precision M4E1 Threaded .223 Wylde Complete Upper Receiver 18in Wylde SS QPQ Rifle Length 1-8 Twist A2 Flash Hider 15 in M-LOK ATLAS R-ONE

Available Merchants(1)

Prices checked Oct 12, 2026

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Optics Planet

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$535

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Build history on GunPartPicker

Builders on GunPartPicker first added the Aero Precision M4E1 Threaded .223 Wylde Complete Upper Receiver 18in Wylde SS QPQ Rifle Length 1-8 Twist A2 Flash Hider 15 in M-LOK ATLAS R-ONE to a build in February 2026.

It 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 $534.99 at Optics Planet for when it comes back.

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Updated Oct 12, 2026 · from real builds on GunPartPicker · Prices checked Oct 12, 2026 · refreshed daily across 37 retailers