Image unavailable
M4e1 5.56mm Assembled Upper Receiver W/Atlas R-One Handguard - M4e1 5.56 Assem Upper Govt 11.5'''' Bbl Carbine Threaded Fde
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$484.99
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: 100036054
Overview
Built for a modern 5.56mm setup, this assembled upper pairs Aero Precision’s M4E1 threaded upper receiver with the ATLAS R-ONE handguard for a streamlined, attachment-ready platform. The handguard is designed to keep the profile slim while still offering ample space for accessories, making it a practical choice for hunters and shooters who want a clean, adaptable rifle setup. Its ATLAS attachment system is intended to provide a secure mounting interface without adding unnecessary bulk. This configuration is well suited to users looking for a complete upper that balances a compact feel with room for mission-specific accessories.
Why Hunters Choose the Aero Precision
Includes Aero
A slim profile
Atlas Attachment
System is described as durable
M-lok Handguard
Plenty of real estate for
M4e1 Threaded
Assembled upper receiver included in
Available Anodized
Black or Cerakote FDE depending
Key Features
- Aero Precision M4E1 assembled upper receiver with ATLAS R-ONE handguard
- 15-inch ATLAS R-ONE M-LOK handguard for attachment options
- ATLAS attachment system designed as a durable mounting platform
- Slim-profile handguard focused on size and weight considerations
- Includes M4E1 threaded assembled upper receiver
- Available in anodized black or Cerakote FDE depending on model
Best Used For
- Hunters building a lightweight, streamlined upper with room for accessories
- Users who want a slim handguard profile without giving up mounting space
- Shooters seeking an assembled upper for a 5.56mm AR-style setup
- Those preferring Aero Precision components and the ATLAS R-ONE handguard system
- Field or range users needing a compact, attachment-ready upper receiver
Specifications
| Attachment System | ATLAS attachment system |
|---|---|
| Barrel | 16" CMV Barrel OR 11.5" Bbl Carbine Threaded FDE |
| Barrel Length | 16" or 11.5" |
| Barrel Threading | Threaded |
| Caliber | 5.56mm |
| Handguard | ATLAS R-ONE M-LOK Handguard |
| Handguard Length | 15" |
| Included Components | M4E1 Threaded Assembled Upper Receiver; 15" ATLAS R-ONE M-LOK Handguard; Barrel |
| Receiver Finish | Anodized Black or Cerakote FDE depending on model |
| Upper Receiver | M4E1 Threaded Assembled Upper Receiver |
Pros
- Includes Aero Precision's ATLAS R-ONE handguard with a slim profile.
- ATLAS attachment system is described as durable and dependable.
- M-LOK handguard offers plenty of real estate for attachments.
- M4E1 threaded assembled upper receiver included in the package.
- Available in anodized black or Cerakote FDE depending on model.
Considerations & Trade-offs
- The ATLAS R-ONE handguard is built with size and weight in mind, so the setup favors a slimmer profile rather than a more bulky handguard.
- The included M-LOK handguard offers attachment space, but accessory placement still depends on the specific gear you plan to mount.
- The product listing shows model-dependent configuration details, so buyers should verify the exact upper/handguard/barrel combination before ordering.
- This is an assembled upper receiver, so it is intended as a component rather than a complete firearm.
Suggested Comparisons
- AR-15 upper receivers
- Complete upper assemblies
- M-LOK handguard uppers
- Aero Precision rifle components
Suggested Accessories
- M-LOK accessories
- Optic mount
- Backup iron sights
- Weapon light
Frequently Asked Questions
What is included with this assembled upper receiver?
The source data says it includes an M4E1 threaded assembled upper receiver and an ATLAS R-ONE M-LOK handguard. The finish is listed as anodized black or Cerakote FDE depending on the model. The description also references a 16" CMV barrel in one configuration, but the provided text is incomplete on the full configuration details.
What handguard system does this upper use?
It uses Aero Precision's ATLAS R-ONE handguard with the proprietary ATLAS attachment system. The description says the handguard is designed to maintain a slim profile while providing a durable and dependable mounting platform.
Is this upper set up for accessory mounting?
Yes. The short description says the ATLAS R-ONE handguard provides plenty of real estate to accommodate attachment needs, and it is an M-LOK handguard.
What finish options are listed for the upper receiver?
The source data lists anodized black or Cerakote FDE depending on the model.
Does the product description specify barrel length and other barrel details?
Only partially. The provided text mentions a 16" CMV barrel in one included configuration, but the long description is truncated and does not fully confirm every barrel detail for this exact product listing.