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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 Blk
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$534.99
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SKU: 100040591
Overview
Built for a 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 leaving room for accessories, making it a practical choice for hunters and shooters who want a clean, organized rifle setup. Its ATLAS attachment system is intended to provide a secure mounting interface without adding unnecessary bulk. This configuration suits users looking for a compact upper assembly that balances accessory space with a restrained overall profile.
Why Hunters Choose the Aero Precision
Aero Precision
M4E1 threaded assembled upper receiver
Atlas R-one
Ample attachment space
Proprietary Atlas
Attachment system provides a durable
M-lok Handguard
Supports accessory mounting options
Available Anodized
Black or Cerakote FDE depending
Key Features
- Aero Precision M4E1 threaded assembled upper receiver
- Includes the ATLAS R-ONE handguard
- Slim-profile handguard designed with size and weight in mind
- ATLAS attachment system provides a durable mounting platform
- M-LOK handguard offers room for accessory attachment
- Available in anodized black or Cerakote FDE depending on model
Best Used For
- Hunters building a lightweight upper with room for lights, grips, or other attachments
- Shooters who want a slim-profile handguard for a compact, streamlined setup
- Users prioritizing a durable mounting platform for accessory-heavy rifle configurations
- Those selecting an assembled upper from Aero Precision for a straightforward build path
Specifications
| Attachment System | ATLAS attachment system |
|---|---|
| Barrel | 16" CMV Barrel OR 10.5" bbl Carbine Threaded Blk |
| Caliber | 5.56mm |
| Handguard | ATLAS R-ONE M-LOK Handguard |
| Handguard Length | 15" |
| Receiver Finish | Anodized Black or Cerakote FDE depending on model |
| Upper Receiver | M4E1 Threaded Assembled Upper Receiver |
Pros
- Aero Precision M4E1 threaded assembled upper receiver included
- ATLAS R-ONE handguard offers a slim profile with ample attachment space
- Proprietary ATLAS attachment system provides a durable mounting platform
- M-LOK handguard supports accessory mounting options
- 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 users who want a more substantial front-end feel may prefer a different setup.
- The product description references multiple included configurations, so buyers should verify the exact model details before ordering.
- This is an assembled upper, not a complete rifle, so it is intended for users building or configuring a compatible platform.
- The listed information does not specify several key build details, so shoppers who need exact component specs should confirm them before purchase.
Suggested Comparisons
- AR-15 upper receivers
- Complete upper assemblies
- Handguard-equipped uppers
- 5.56mm rifle components
Suggested Accessories
- Weapon light mount
- Backup iron sights
- Sling attachment
- M-LOK accessory rail
Frequently Asked Questions
What is included with this assembled upper receiver?
The source data says it includes an M4E1 threaded assembled upper receiver and a 15" ATLAS R-ONE M-LOK handguard. The listing also references a 16" CMV barrel in one configuration, but the provided text is truncated and does not fully confirm every included component for all variants.
What handguard does this upper use?
It uses Aero Precision's ATLAS R-ONE handguard with an M-LOK interface and the proprietary ATLAS attachment system.
Is the upper receiver finish specified?
Yes. The source states the M4E1 threaded assembled upper receiver is anodized black or Cerakote FDE depending on the model.
What does the product description say about the ATLAS R-ONE handguard?
It says the handguard is designed with size and weight in mind while still providing plenty of real estate for attachment needs, and that the ATLAS attachment system is intended to provide a durable, dependable mounting platform with a slim profile.
Is the barrel length fully confirmed in the provided data?
No. The title references a 10.5" barrel, while the short description mentions a 16" CMV barrel in one configuration. Because the provided text is inconsistent and truncated, the exact barrel configuration should be verified before purchase.