The Aero Precision M4E1 Threaded Complete Upper Receiver combines precision craftsmanship and high-performance features to create an ideal platform for AR-15 builds. Equipped with an 18-inch 5.56 NATO rifle-length barrel and a 15-inch ATLAS R-ONE M-LOK handguard, this complete upper provides exceptional accuracy, durability, and modularity. The M4E1 threaded receiver delivers a sleek "billet look" with enhanced functionality and strength, finished in anodized black for long-lasting performance.
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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 18-inch CMV barrel is made from 4150 CrMoV steel with a QPQ finish, ensuring outstanding durability and resistance to corrosion. Featuring a rifle-length gas system, a 1:7 twist rate, and an A2 flash hider, this barrel delivers consistent performance with various ammunition types. The low-profile gas block enhances reliability and complements the clean aesthetics of the build.
The 15-inch ATLAS R-ONE M-LOK handguard offers a lightweight and slim profile with full M-LOK compatibility for versatile accessory mounting. Its integrated quick disconnect sling sockets provide added utility for sling setups. The M4E1 threaded receiver includes laser-engraved T-marks, M4 feed ramps, and pre-installed port door and forward assist for out-of-the-box readiness. Note: This complete upper does not include a BCG or charging handle, allowing for user customization.
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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