AeroPrecision167527280
M4E1 5.56 Assembled Upper Rcvr Threaded W/Ar15 Semi-Cut Blk$154.10
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Availability: In Stock
Current Stock: Out of stock
The Aero Precision M4E1 Assembled Upper Receiver is a forged AR15 upper built for shooters who want precision engineering without the billet price tag. Machined from 7075-T6 aluminum and threaded to accept standard AR15 barrel nuts, this upper delivers a refined, angular profile that stands out visually while maintaining full compatibility with mil-spec AR15 parts. It arrives assembled with the port door and forward assist already installed, so you can focus on building instead of wrestling with tiny springs.
The M4E1's enhanced forging gives it a billet-like appearance that pairs beautifully with Aero Precision's Enhanced and ATLAS Series handguards, thanks to a picatinny profile designed for seamless integration. The receiver features M4 feedramps and .250 takedown pin holes, ensuring reliable feeding and a solid lockup with mil-spec lower receivers—including Aero's own M4E1 lower for a cohesive, purpose-built upper and lower set.
Whether you're building a duty rifle, a precision range gun, or a hunting platform, this upper receiver handles the job with the attention to detail Aero Precision is known for. It's a smart choice for anyone who wants quality engineering and thoughtful design without compromise.
| Brand | Aero Precision |
| Model | M4E1 Assembled Upper Receiver |
| Part Number | APAR700201AC |
| Material | 7075-T6 Aluminum Forging |
| Finish | Black |
| Barrel Nut Type | Threaded (Standard AR15) |
| Feedramp Style | M4 |
| Takedown Pin Holes | .250 |
| Included Components | Port door, forward assist, threaded forward assist roll pin |
Yes. The M4E1 upper is precision machined to work with all mil-spec AR15 parts and lower receivers, including Aero Precision's M4E1 lower for a matched set.
The M4E1 is threaded to accept a standard AR15 barrel nut, which is widely available and works with most common AR15 barrels.
The port door and forward assist are pre-installed, along with the threaded forward assist roll pin. You don't need to assemble those components yourself.
The M4E1's picatinny profile is designed to blend seamlessly with Aero Precision's Enhanced and ATLAS Series handguards, though it will work with any picatinny-compatible handguard.
SKU: 121686205 • Width: 3.5in • Height: 3in • Depth: 9.75in • Weight: 0.75oz
Availability: In Stock
Current Stock: Out of stock
The Aero Precision M4E1 Assembled Upper Receiver is a forged AR15 upper built for shooters who want precision engineering without the billet price tag. Machined from 7075-T6 aluminum and threaded to accept standard AR15 barrel nuts, this upper delivers a refined, angular profile that stands out visually while maintaining full compatibility with mil-spec AR15 parts. It arrives assembled with the port door and forward assist already installed, so you can focus on building instead of wrestling with tiny springs.
The M4E1's enhanced forging gives it a billet-like appearance that pairs beautifully with Aero Precision's Enhanced and ATLAS Series handguards, thanks to a picatinny profile designed for seamless integration. The receiver features M4 feedramps and .250 takedown pin holes, ensuring reliable feeding and a solid lockup with mil-spec lower receivers—including Aero's own M4E1 lower for a cohesive, purpose-built upper and lower set.
Whether you're building a duty rifle, a precision range gun, or a hunting platform, this upper receiver handles the job with the attention to detail Aero Precision is known for. It's a smart choice for anyone who wants quality engineering and thoughtful design without compromise.
| Brand | Aero Precision |
| Model | M4E1 Assembled Upper Receiver |
| Part Number | APAR700201AC |
| Material | 7075-T6 Aluminum Forging |
| Finish | Black |
| Barrel Nut Type | Threaded (Standard AR15) |
| Feedramp Style | M4 |
| Takedown Pin Holes | .250 |
| Included Components | Port door, forward assist, threaded forward assist roll pin |
Yes. The M4E1 upper is precision machined to work with all mil-spec AR15 parts and lower receivers, including Aero Precision's M4E1 lower for a matched set.
The M4E1 is threaded to accept a standard AR15 barrel nut, which is widely available and works with most common AR15 barrels.
The port door and forward assist are pre-installed, along with the threaded forward assist roll pin. You don't need to assemble those components yourself.
The M4E1's picatinny profile is designed to blend seamlessly with Aero Precision's Enhanced and ATLAS Series handguards, though it will work with any picatinny-compatible handguard.
SKU: 121686205 • Width: 3.5in • Height: 3in • Depth: 9.75in • Weight: 0.75oz