Aero Precision M4E1 Threaded Assembled Upper Receiver, OD Green

Aero Precision M4E1 ODG Upper Receiver Features This M4E1 upper features an enhanced forging process that gives it the look of a custom billet receiver while delivering the strength and reliability of forged 7075-T6 aluminum. The forged profile includes a machined-in Picatinny rail with laser-engraved T-marks for consistent optics placement and alignment. With a seamless visual transition between the upper and Aero Precision s Enhanced and ATLAS Series Handguards this receiver creates a unified and streamlined platform. Engineered for maximum compatibility the M4E1 upper features .250 takedown pin holes and standard M4 feedramps to ensure reliable cycling with a broad range of standard AR15 barrels and bolt carrier groups. It ships fully assembled and includes a forward assist port door and Aero's threaded forward assist roll pin which simplifies installation and reduces the risk of damaging the receiver finish during assembly. Whether you re building a precision rifle a duty carbine or a competition-grade upper the M4E1 upper offers both functional benefits and an aggressive look that sets your build apart. Its rugged olive drab green anodized coating not only adds corrosion resistance but also enhances durability and visual appeal in any tactical environment. Aero Precision M4E1 Upper Receiver Specifications Manufacturer: Aero Precision Model: M4E1 Assembled Upper Receiver Finish: Anodized Olive Drab Green Material: 7075-T6 Forged Aluminum Caliber Compatibility: AR15 platforms (.223 Rem / 5.56 NATO / .300 BLK etc.) Feed Ramps: M4 Feedramps Takedown Pin Holes: .250 inch Top Rail: Picatinny with laser-engraved T-marks Compatibility: Works with standard AR15 barrels BCGs and handguards Enhanced Design: Forged billet-style profile Includes: Port door (installed) Forward assist (installed) Threaded forward assist roll pin Special Feature: Seamless visual integration with Aero Enhanced and ATLAS Series Handguards