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M4e1 Upper Receivers Complete Threaded 5.56mm - M4e1 5.56 Assembled Upper Govt 18'''' Bbl Rifle Threaded Black
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$599.99
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SKU: 100054461
Overview
Built as a complete upper for a 5.56 rifle setup, this Aero Precision package pairs an M4E1 threaded assembled upper receiver with a 15" ATLAS R-ONE M-LOK handguard. 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, adaptable front end. The ATLAS attachment system is presented as a durable mounting platform, and the configuration is offered with either a 16" 5.56 CMV barrel or an 18" rifle-length 5.56 CMV barrel. It suits users looking for a ready-to-build upper with a straightforward black finish and a setup aimed at accessory flexibility.
Why Hunters Choose the Aero Precision
Includes Aero
Precision’s ATLAS R-ONE handguard system
Slim-profile Handguard
Size and weight in mind
M-lok Handguard
Attachment space for accessories
Atlas Attachment
System is described as durable
Complete Upper
Includes an anodized black M4E1
Key Features
- Complete upper receiver from Aero Precision
- Includes the M4E1 threaded assembled upper receiver in anodized black
- Features a 15-inch ATLAS R-ONE M-LOK handguard
- ATLAS attachment system is designed as a durable, dependable mounting platform
- Slim handguard profile with space for attachment needs
- Offered with 5.56 CMV barrel configuration options
Best Used For
- Hunters building a complete upper with a slim handguard and attachment space for accessories.
- Users wanting an assembled upper receiver package with Aero Precision’s M4E1 threaded design.
- Rifle owners seeking a 5.56 complete upper with either 16-inch or 18-inch barrel configuration.
- Shooters who prefer a handguard designed to balance compact size with mounting flexibility.
Specifications
| Barrel Caliber | 5.56 |
|---|---|
| Barrel Length | 18" |
| Barrel Material | CMV |
| Barrel Profile | Government |
| Barrel Threaded | Yes |
| Handguard | 15" ATLAS R-ONE M-LOK Handguard |
| Handguard System | ATLAS attachment system |
| Included Alternative Barrel Option | 16" 5.56 CMV Barrel |
| Included Barrel Option | 18" 5.56 Rifle Length CMV |
| M Lok | Yes |
| Rifle Length | Yes |
| Upper Receiver | M4E1 Threaded Assembled Upper Receiver |
| Upper Receiver Finish | Anodized Black |
Pros
- Includes Aero Precision’s ATLAS R-ONE handguard system.
- Slim-profile handguard is designed with size and weight in mind.
- M-LOK handguard offers attachment space for accessories.
- ATLAS attachment system is described as durable and dependable.
- Complete upper includes an anodized black M4E1 threaded assembled receiver.
Considerations & Trade-offs
- This is a complete upper receiver, so it is intended for users building or configuring a compatible rifle platform rather than as a standalone firearm.
- The listing presents two possible configurations: a 16" 5.56 CMV barrel or an 18" 5.56 rifle-length CMV barrel, so buyers should verify which version is being selected before ordering.
- The ATLAS R-ONE handguard is described as slim and size-conscious, which may leave less bulk for those who prefer a fuller front-end feel.
- The M-LOK handguard provides attachment space, but accessories still need to be chosen around the available rail layout and overall setup goals.
Suggested Comparisons
- Complete upper receiver assemblies
- AR-15 upper receivers
- M-LOK handguard-equipped uppers
- 5.56 NATO rifle uppers
Suggested Accessories
- Rifle optic mount
- M-LOK accessory rail sections
- Weapon light
- Sling
Frequently Asked Questions
What comes included with this complete upper receiver assembly?
The listed contents are an M4E1 threaded assembled upper receiver in anodized black and a 15" ATLAS R-ONE M-LOK handguard. The description also lists two barrel configurations: 16" 5.56 CMV barrel or 18" 5.56 rifle-length CMV.
Is this upper chambered for 5.56?
Yes. The product is described as a complete upper in 5.56, with both barrel configurations listed as 5.56 CMV.
What handguard system does this upper use?
It uses Aero Precision's ATLAS R-ONE handguard with the ATLAS attachment system. The description says it is designed to maintain a slim profile while providing mounting space for attachments.
Does this upper support accessory mounting?
Yes. The ATLAS R-ONE handguard is described as offering plenty of real estate for attachment needs, and it uses an M-LOK interface.
Is the barrel length fixed on this product listing?
The provided description lists two options: a 16" 5.56 CMV barrel or an 18" 5.56 rifle-length CMV barrel. The source data does not clarify which configuration is included with the exact item shown here.