Image unavailable
M4e1 Threaded 350 Legend Assembled Upper Receiver - M4e1 350 Legend Assembled Upper M4 20'''' Carbine Threaded Fde
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$589.99
View on Brownells
You'll be taken to Brownells to complete your purchase.
Hunter's Outpost earns a commission from affiliate links at no extra cost to you.
SKU: 430103075
Overview
Built for hunters and shooters setting up a .350 Legend AR platform, this assembled upper receiver provides a ready starting point for a carbine-length build. It features Aero Precision’s enhanced forging with a billet-style appearance, along with a Picatinny profile designed to integrate with Enhanced Series handguards. The upper includes the port door and forward assist already installed, while charging handle and bolt carrier group are not included, so it suits users who want to complete the build with their preferred components.
Why Hunters Choose the Aero Precision
Enhanced Forging
Gives the upper receiver a
Picatinny Profile
Enhanced Series Handguards
M4 Feedramps
Are included in the receiver
.250 Takedown
Pin holes support compatible assembly
Laser Engraved
T-marks aid optic and accessory
Key Features
- Enhanced M4E1 threaded upper receiver from Aero Precision
- Enhanced forging gives the 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 support optic and accessory setup
- Port door and forward assist are installed; charging handle and bolt carrier group are not included
Best Used For
- Hunters building a .350 Legend upper for a compatible AR-15 setup
- Shooters wanting an assembled upper with port door and forward assist installed
- Users planning a custom rifle around Aero Precision Enhanced Series handguards
- Buyers who already have a charging handle and bolt carrier group available
Specifications
| Bolt Carrier Group | Not included |
|---|---|
| Caliber | 350 Legend |
| Charging Handle | Not included |
| Fde | Yes |
| Feedramps | M4 Feedramps |
| Forward Assist | Included |
| 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 |
| T Marks | Laser engraved |
| Takedown Pin Holes | 0.250 in |
| Threaded | Yes |
| Upper Receiver Type | Assembled Upper Receiver |
Pros
- Enhanced forging gives the upper receiver a billet-like appearance.
- Picatinny profile blends seamlessly with Enhanced Series Handguards.
- M4 feedramps are included in the receiver design.
- .250 takedown pin holes support compatible assembly.
- Laser engraved T-marks aid optic and accessory placement.
- Port door and forward assist are already installed.
Considerations & Trade-offs
- Does not include a charging handle or bolt carrier group, so those components must be selected separately before the upper is ready to run.
- The threaded upper is described as an assembled upper receiver, but the listing does not include a complete rifle setup or lower receiver.
- The enhanced forging and picatinny profile are designed to pair with Aero Precision Enhanced Series handguards, so fit and appearance are most aligned within that system.
- The product is specific to .350 Legend, which limits it to that cartridge platform rather than a more general-purpose upper.
Suggested Comparisons
- AR-15 upper receivers
- Complete upper receiver assemblies
- 350 Legend rifle components
- AR platform handguards
Suggested Accessories
- Charging handle
- Bolt carrier group
- Handguard
- Lower receiver
Frequently Asked Questions
Does this upper receiver come complete with everything needed to run the rifle?
No. The source data says it includes the port door and forward assist installed, but it does not include a charging handle or bolt carrier group.
What cartridge is this upper receiver made for?
It is a 350 Legend upper receiver, as stated in the product title.
Is this an assembled upper receiver?
Yes. The product title identifies it as an assembled upper receiver.
What features are listed on the M4E1 upper receiver?
The listed features are an enhanced forging with a "billet look," a new picatinny profile that blends with Enhanced Series Handguards, M4 feedramps, .250 takedown pin holes, laser engraved T-marks, and an installed port door and forward assist.
Who makes this upper receiver?
The manufacturer listed in the source data is Aero Precision.