The Aero Precision M4E1 Threaded Complete Upper Receiver combines precision engineering with high-quality components, making it an ideal choice for AR-15 builds. This complete upper features a 16-inch 5.56 NATO mid-length barrel and a 15-inch ATLAS R-ONE M-LOK handguard, delivering excellent performance and modularity. Designed for durability and reliability, the upper includes an anodized black M4E1 threaded assembled receiver, providing a seamless and refined appearance.
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Pay in 4. Four Payments, no interest for purchases between $150 to $985. No hard credit inquires for Pre-Approval. Apply and Buy Today!
Shoot Now, Pay Later® 4 Pay and Traditional Financing
Try Pay in 4 at 0% interest for purchases between $150 to $985. Or Select Easy installments up to 36 months. Approvals up to $5,000. No hard credit inquires for Pre-Approval. Apply and Buy Today!
Aero Precision M4E1 Threaded Complete Upper Features
The 16-inch barrel is constructed from 4150 CrMoV steel with a QPQ finish for enhanced durability and corrosion resistance. It features a mid-length gas system and a 1:7 twist rate, making it versatile for a wide range of ammunition. The ATLAS R-ONE handguard provides a slim profile, full M-LOK compatibility, and a lightweight design while maintaining strength. Its quick disconnect sling sockets at multiple positions add convenience for versatile sling setups.
The M4E1 threaded upper receiver is designed with an enhanced forging for a "billet look" and includes laser-engraved T-marks, M4 feed ramps, and a pre-installed port door and forward assist. This product does not include a BCG or charging handle, giving users flexibility to customize their build.
WARNING: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to WWW.P65WARNINGS.CA.GOV
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