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M4e1 Assembled Upper Receiver Threaded 5.56mm Fde - M4e1 5.56 Nato Assembled Upper Rcvr Threaded W/M16 Cut Fde
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$155.99
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SKU: 100054333
Overview
Built for AR-15 builders who want a more refined receiver profile without moving away from standard compatibility, this upper combines an angular machined design with a threaded interface for a standard AR15 barrel nut. It is forged from 7075-T6 aluminum, precision machined to work with mil-spec AR15 parts, and comes with the port door and forward assist already installed. The enhanced body profile is intended to complement Aero Precision’s M4E1 lower receiver for a coordinated build. For hunters and shooters assembling a field-ready rifle, it offers a distinctive look with the practical advantage of familiar parts compatibility.
Why Hunters Choose the Aero Precision
Angular Machined
Design sets it apart from
Threaded Accept
Standard AR15 barrel nut
Forged From
7075-T6 aluminum for a durable
Precision Machined
All mil-spec AR15 parts
Port Door
Forward assist come pre-installed
Key Features
- Angular machined M4E1 design distinguishes it from standard mil-spec upper receivers.
- Threaded to accept a standard AR15 barrel nut.
- Forged from 7075-T6 aluminum.
- Precision machined to work with all mil-spec AR15 parts.
- Port door and forward assist are pre-installed.
- Designed to pair with the M4E1 Lower Receiver for a billet-looking receiver set.
Best Used For
- Builders seeking a threaded upper receiver compatible with a standard AR15 barrel nut and mil-spec parts.
- Users wanting an assembled upper with port door and forward assist already installed.
- AR15 owners pairing components with an M4E1 Lower Receiver for a matched receiver set.
- Hunters and shooters who prefer an angular, enhanced receiver profile over standard mil-spec styling.
Specifications
| Assembly Status | Assembled |
|---|---|
| Barrel Nut Compatibility | Standard AR15 barrel nut |
| Blade Finish | FDE |
| Caliber | 5.56mm |
| Calibercartridge | 5.56 NATO |
| Compatibility | Mil-spec AR15 parts |
| Enhanced Body Profile | Yes |
| Forged | Yes |
| Forward Assist | Pre-installed |
| M16 Cut | Yes |
| Material | 7075-T6 Aluminum |
| Port Door | Pre-installed |
| Precision Machined | Yes |
| Receiver Type | Upper Receiver |
| Threaded | Yes |
Pros
- Angular machined design sets it apart from standard mil-spec upper receivers.
- Threaded to accept a standard AR15 barrel nut.
- Forged from 7075-T6 aluminum for a durable receiver foundation.
- Precision machined to work with all mil-spec AR15 parts.
- Port door and forward assist come pre-installed.
- Designed to pair with the M4E1 Lower Receiver for a matched look.
Considerations & Trade-offs
- Threaded to accept a standard AR15 barrel nut, so it is not a drop-in match for every upper/handguard setup and should be checked for compatibility before purchase.
- Designed to pair with the M4E1 Lower Receiver for the intended receiver-set look; that pairing is part of the design intent rather than a universal fit-and-finish guarantee across all builds.
- Includes the port door and forward assist pre-installed, which reduces assembly steps but also means those components are not left as separate user-selected parts.
- The enhanced, angular profile is a deliberate departure from standard mil-spec styling, so buyers seeking a traditional receiver appearance may prefer a more conventional option.
Suggested Comparisons
- AR-15 upper receivers
- AR-15 receiver sets
- AR-15 upper receiver assemblies
- AR-15 parts and components
Suggested Accessories
- AR15 barrel nut
- M4E1 lower receiver
- Port door assembly
- Forward assist assembly
Frequently Asked Questions
What platform is this upper receiver intended for?
It is a threaded upper receiver for 5.56mm / 5.56 NATO AR15-style builds and is described as working with all mil-spec AR15 parts.
Does this upper accept a standard AR15 barrel nut?
Yes. The product description says it is threaded to accept a standard AR15 barrel nut.
What comes pre-installed on the upper receiver?
The port door and forward assist are included and pre-installed.
What material is the upper receiver made from?
It is forged from 7075-T6 aluminum.
Is this a complete upper with barrel and handguard included?
The provided data identifies it as an assembled upper receiver, but it does not list a barrel, handguard, or other complete upper components. Those details are not specified here.