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M4e1 5.56mm Assembled Upper Receiver W/Atlas R-One Handguard - M4e1 5.56mm Assembled Upper M4 10.5''''bbl Carbine Threaded Fde
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$569.99
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SKU: 100040592
Overview
Built around Aero Precision’s M4E1 threaded assembled upper receiver, this setup is aimed at shooters who want a ready-to-install upper with a streamlined handguard system. The ATLAS R-ONE handguard is designed to keep the profile slim while still leaving room for accessories, making it a practical choice for a field rifle or a range-focused build. Its ATLAS attachment system is presented as a stable mounting platform, and the overall package is offered in anodized black or Cerakote FDE depending on model. For hunters and outdoorsmen planning a compact 5.56mm build, it offers a straightforward foundation without unnecessary bulk.
Why Hunters Choose the Aero Precision
Includes Aero
A slim profile
Atlas Attachment
System is described as durable
Handguard Design
Leaves plenty of real estate
M4e1 Threaded
Assembled upper receiver is included
Available Anodized
Black or Cerakote FDE depending
Key Features
- Aero Precision M4E1 threaded assembled upper receiver
- Includes a 15-inch ATLAS R-ONE M-LOK handguard
- ATLAS attachment system provides a durable mounting platform
- Slim-profile handguard designed with size and weight in mind
- Available in anodized black or Cerakote FDE depending on model
Best Used For
- Hunters wanting a streamlined upper with room for lights, grips, and other attachments
- Users who prefer a slim-profile handguard for a cleaner, less bulky setup
- Builds centered on Aero Precision components and the ATLAS R-ONE mounting system
- Shooters looking for an assembled upper rather than sourcing parts individually
Specifications
| Attachment System | ATLAS attachment system |
|---|---|
| Barrel | 10.5" bbl |
| Barrel Profile | Carbine |
| Blade Finish | Cerakote FDE or Anodized Black |
| Caliber | 5.56mm |
| Cmv Barrel | 16" CMV Barrel OR |
| Color | FDE |
| Handguard | ATLAS R-ONE M-LOK Handguard |
| Handguard Length | 15" |
| Included Components | Upper receiver and ATLAS R-ONE handguard |
| M Lok | Yes |
| Threaded | Yes |
| 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.
- Handguard design leaves plenty of real estate for attachments.
- M4E1 threaded assembled upper receiver is included.
- Available in anodized black or Cerakote FDE depending on model.
Considerations & Trade-offs
- The ATLAS R-ONE handguard is built around a slim profile, so accessory space is available without adding bulk, but it may feel more minimal than a fuller handguard setup.
- This assembled upper is offered in different model configurations, including anodized black or Cerakote FDE depending on the version, so finish is not uniform across all listings.
- The included 15" ATLAS R-ONE M-LOK handguard and upper receiver are part of a complete assembly, which limits customization at the component level compared with building each part separately.
- The product listing references a 10.5" barrel in the title while the description also mentions a 16" CMV barrel in the included components, so buyers should verify the exact configuration before ordering.
Suggested Comparisons
- AR-15 upper receiver assemblies
- Handguards and rail systems
- Complete upper builds
- M-LOK accessory platforms
Suggested Accessories
- M-LOK accessories
- Optic mount
- Weapon light mount
- Foregrip
Frequently Asked Questions
What is included with this assembled upper receiver?
According to the product data, it includes an M4E1 threaded assembled upper receiver and a 15" ATLAS R-ONE M-LOK handguard. The listing also references model-dependent finish options, 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 source describes it as a slim-profile mounting platform designed to provide attachment space while maintaining strength and stability.
Is this upper available in more than one finish?
Yes. The source says the M4E1 threaded assembled upper receiver is anodized black or Cerakote FDE depending on the model.
Does the product data specify the barrel length and barrel type?
The listing mentions a 16" CMV barrel in one of the included configurations, but the provided text is incomplete and does not clearly confirm every available configuration for this exact product title.
What kind of accessories can the handguard support?
The product description says the ATLAS R-ONE handguard provides plenty of real estate to accommodate attachment needs and uses an M-LOK interface. The source does not specify which exact accessories are included.