Aero Precision M4E1 5.56 NATO Threaded Black Anodized Receiver

Aero Precision M4E1 Threaded Receiver 5.56x45mm NATO — 7075‑T6 Black Anodized AR‑15 Upper

The Aero Precision M4E1 Threaded Receiver is a precision‑machined, mil‑spec compatible AR‑15 upper engineered for builders who want a rigid, feature‑rich platform. Machined from forged 7075‑T6 aluminum and finished in durable black anodize, this threaded M4E1 upper accepts standard AR‑15 barrel nuts and handguards, features a Picatinny rail profile and M4 feedramps, and delivers the fit and function needed for high‑performance 5.56x45mm NATO builds.

Key Features

• Threaded M4E1 upper receiver designed for 5.56x45mm NATO AR‑15 builds
• Forged 7075‑T6 aluminum construction for industry‑leading strength and light weight
• Durable black anodized finish for corrosion resistance and low‑glare tactical appearance
• Threads to accept standard AR‑15 barrel nuts and most AR‑15 handguard systems
• Picatinny rail integrated on the receiver for secure optic mounting and zero retention
• M4 feedramps for reliable feeding with common magazines and ammunition types
• .250" takedown pin holes and standard AR‑15 interface for effortless installation
• Angular M4E1 machined styling — modern billet look with forged strength
• Machined to mil‑spec tolerances to ensure compatibility with AR‑15 parts and lowers

Specifications

• Brand: Aero Precision
• Model: M4E1 Threaded Receiver (Stripped Upper)
• Category: Uppers / AR‑15 Threaded Receiver
• Caliber: 5.56x45mm NATO (AR‑15 platform)
• Firearm Fit: AR‑15 / AR Style
• Receiver Material: Forged 7075‑T6 Aluminum (machined)
• Receiver Finish: Black Anodized
• Type: Stripped upper (requires parts to complete)
• Features: Picatinny rail profile, M4 feedramps, .250" takedown pin holes, threads for AR‑15 barrel nut
• Weight: ~6.90 oz (stripped)
• Made: USA (manufactured and machined in the United States)
• Note: Requires dust cover, forward assist, charging handle, barrel, handguard, gas block, gas tube, muzzle device and BCG to complete

The Aero Precision M4E1 Threaded Receiver provides a rugged, mil‑spec foundation for custom 5.56 NATO AR‑15 builds—pair it with your choice of barrel, handguard, and BCG to assemble a reliable, high‑performance upper that matches the precision and durability Aero Precision is known for.