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M5e1 .308 Win Enhanced Assembled Upper Receivers W/No Barrel - M5e1 Enhanced 308 Winchester Assembled Upper Receiver Black
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$219.99
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SKU: 430103899
Overview
Built around Aero Precision’s M5E1 platform, this assembled upper receiver is intended for .308 Winchester builds that use a free-floated handguard setup. Its one-piece design integrates the handguard mounting platform with the upper receiver, reducing the number of parts involved in installation and simplifying assembly. The design also incorporates lightening cuts and a shared forging for the mounting surface and upper, which may appeal to builders looking for a streamlined, purpose-built foundation. It is a practical choice for hunters and shooters assembling a blacked-out M5E1-pattern upper without a barrel.
Why Hunters Choose the Aero Precision
One-piece Upper
Handguard mounting platform simplifies the
Uses Only
Eight screws to mount a
Same-forging Design
The upper receiver
Additional Lightening
Cuts are built into the
Includes Barrel
Nut for straightforward barrel assembly
Key Features
- M5E1 upper receiver platform for .308 Winchester builds
- One-piece design combines the handguard mounting platform with the upper
- Free-floated handguard mounting uses only 8 screws
- Same-forging construction supports a stronger receiver system
- Additional lightening cuts help reduce weight and improve cooling
- Includes barrel nut for straightforward installation
Best Used For
- Builders assembling a .308 Winchester AR platform with a free-floated handguard setup
- Users who want a one-piece upper receiver and handguard mounting platform
- Hunters planning a custom M5E1 build with straightforward barrel installation
- Shooters prioritizing a streamlined upper receiver design with fewer mounting parts
Specifications
| Caliber | 308 Win |
|---|---|
| Color | Black |
| Configuration | W/No Barrel |
| Design | One-piece design |
| Ease Of Installation | Yes |
| Forging | Same forging for handguard mounting surface and upper |
| Free Floated Handguard Compatibility | Yes |
| Handguard Mounting Hardware | 8 screws |
| Handguard Mounting Platform | Integrated with upper receiver |
| Included Barrel Nut | Included |
| Lightening Cuts | Yes |
| Platform | M5E1 |
| Upper Receiver Type | Assembled Upper Receiver |
Pros
- One-piece upper and handguard mounting platform simplifies the build.
- Uses only eight screws to mount a free-floated handguard.
- Same-forging design integrates the mounting surface with the upper receiver.
- Additional lightening cuts are built into the receiver design.
- Includes barrel nut for straightforward barrel assembly installation.
Considerations & Trade-offs
- This is an upper receiver only and does not include a barrel, so it is not a complete build component by itself.
- The M5E1 design is intended for a free-floated handguard setup, so compatibility depends on using the matching mounting system.
- Installation is simplified by the included barrel nut, but the platform still requires proper assembly and compatible parts.
- The one-piece design may reduce parts count, but it also ties the handguard mounting surface to this specific upper format.
Suggested Comparisons
- AR-10 style upper receivers
- Free-float handguard mounting systems
- Complete upper receiver assemblies
- .308 Winchester rifle components
Suggested Accessories
- Free-float handguard
- Barrel assembly
- Upper receiver parts kit
- Armorer's wrench
Frequently Asked Questions
What is included with this M5E1 upper receiver assembly?
The source data identifies it as an assembled upper receiver with no barrel. It also notes that the barrel nut is included for installation. No other included components are specified.
Is this upper receiver compatible with .308 Winchester / 308 Win builds?
Yes. The product title identifies it as an M5E1 .308 Win / 308 Winchester assembled upper receiver.
What makes the M5E1 platform different from a standard upper receiver?
According to the description, the M5E1 uses a one-piece design that combines the handguard mounting platform with the upper receiver. Aero Precision also states that this reduces the parts needed to mount a free-floated handguard to 8 screws.
Does this upper receiver come with a barrel?
No. The title states "W/No Barrel," so the barrel is not included.
What finish or color is this upper receiver?
The product title identifies it as black.