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M4e1 Threaded 350 Legend Assembled Upper Receiver - M4e1 350 Legend Assembled Upper M4 16'''' Carbine Threaded Fde
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$549.99
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SKU: 430103074
Overview
Built for hunters and shooters setting up a .350 Legend AR platform, this assembled upper receiver provides a ready starting point for a custom rifle build. It includes the port door and forward assist already installed, while leaving out the charging handle and bolt carrier group so those components can be selected separately. The enhanced forging gives the receiver a refined look, and the picatinny profile is designed to work with Enhanced Series handguards. With M4 feedramps, .250 takedown pin holes, and laser-engraved T-marks, it suits a practical build focused on straightforward assembly and compatibility.
Why Hunters Choose the Aero Precision
Enhanced Forging
Gives the upper receiver a
Picatinny Profile
Enhanced Series Handguards
Includes M4
Feedramps for the listed 350
Port Door
Forward assist come installed from
Laser Engraved
T-marks support easier accessory alignment
Key Features
- M4E1 threaded upper receiver from Aero Precision
- Enhanced forging gives the upper receiver a billet-like appearance
- Picatinny profile is designed to blend with Enhanced Series handguards
- Includes M4 feedramps and .250 takedown pin holes
- Laser engraved T-marks are included on the receiver
- Port door and forward assist come installed
- Charging handle and bolt carrier group are not included
Best Used For
- Hunters building a 350 Legend setup around an Aero Precision upper receiver
- Users wanting an assembled upper with port door and forward assist already installed
- Shooters pairing Enhanced Series handguards with a matching M4E1 upper profile
- Builders who prefer a threaded upper and plan to choose their own charging handle and BCG
Specifications
| Bolt Carrier Group Included | No |
|---|---|
| Caliber | 350 Legend |
| Charging Handle Included | No |
| Feedramps | M4 |
| Forward Assist Included | Yes |
| Handguard Compatibility | Enhanced Series Handguards |
| M4e1 Threaded Upper Receiver Features | New enhanced forging that gives the upper receiver a "billet look"; New picatinny profile that blends seamlessly with Enhanced Series Handguards; M4 Feedramps; .250 takedown pin holes; Laser engraved T-marks; Includes port door and forward assist installed; Does not include charging handle or bolt carrier group |
| Port Door Included | Yes |
| T Marks | Laser engraved |
| Takedown Pin Holes | .250 |
| Threaded | Yes |
| Upper Receiver Type | Assembled Upper Receiver |
Pros
- Enhanced forging gives the upper receiver a billet-like appearance
- Picatinny profile integrates cleanly with Enhanced Series Handguards
- Includes M4 feedramps for the listed 350 Legend upper
- Port door and forward assist come installed from the factory
- Laser engraved T-marks support easier accessory alignment
- Uses .250 takedown pin holes for compatibility with listed specifications
Considerations & Trade-offs
- Does not include a charging handle or bolt carrier group, so those components must be sourced separately before the upper is ready to run.
- This is an assembled upper receiver only; it is not a complete firearm and requires a compatible lower receiver and other matching components.
- The threaded upper is configured for .350 Legend, so caliber-specific compatibility should be verified with the rest of the build.
- The enhanced forging and integrated features are aimed at a cleaner fit with Aero Precision Enhanced Series handguards, which may matter if you are planning a mixed-component setup.
Suggested Comparisons
- AR-15 upper receivers
- 350 Legend upper assemblies
- complete upper receiver groups
- AR-15 handguard-compatible uppers
Suggested Accessories
- Charging handle
- Bolt carrier group
- Enhanced series handguard
- Upper receiver vise block
Frequently Asked Questions
What comes included with this M4E1 threaded upper receiver assembly?
It includes the port door and forward assist installed. The charging handle and bolt carrier group are not included.
Is this upper receiver ready to use as a complete upper out of the box?
It is an assembled upper receiver, but it is not complete by itself because it does not include a charging handle or bolt carrier group.
What features does the M4E1 upper receiver offer for handguard compatibility?
The product description says it has a new picatinny profile that blends seamlessly with Aero Precision’s Enhanced Series Handguards.
What receiver details are listed for this upper?
The listed features include M4 feedramps, .250 takedown pin holes, and laser engraved T-marks.
Does the product description specify the barrel, bolt, or other internal components?
No. The provided data does not list a barrel, bolt, or bolt carrier group; it only notes that the charging handle and bolt carrier group are not included.