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M4e1 Threaded 6.5 Grendel Assembled Upper Receiver W/Atlas R-One - M4e1-T 6.5 Grendel Assem Upper Dmr 20''''bbl Rifle Threaded Blk
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$689.99
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SKU: 430103941
Overview
Built for an AR15 setup centered on the 6.5 Grendel cartridge, this complete upper is aimed at hunters and shooters who want a low-recoil, accuracy-focused option for longer-range work. The included ATLAS R-ONE handguard is described as balancing compact size and available mounting space, which makes it practical for adding accessories without adding unnecessary bulk. Aero Precision’s ATLAS attachment system is presented as a slim, stable platform for the handguard. This upper is a straightforward choice for a rifle build intended to reach beyond typical carbine distances.
Why Hunters Choose the Aero Precision
Complete Upper
Receiver for an AR15 build
Designed Around
Low recoil, high accuracy cartridge
Includes Aero
Precision’s ATLAS R-ONE handguard
Handguard Offers
Attachment real estate while maintaining
Atlas Attachment
System is described as durable
Key Features
- Complete 6.5 Grendel upper receiver for an AR15 build.
- Designed around a low-recoil, high-accuracy cartridge.
- Intended for shooters looking to extend AR15 effective range.
- Includes Aero Precision ATLAS R-ONE handguard.
- Handguard emphasizes compact size and reduced weight.
- ATLAS attachment system provides a slim mounting platform with strength and stability.
Best Used For
- Hunters building an AR15 for 6.5 Grendel use and long-range target work
- Shooters wanting a complete upper for a low-recoil, accuracy-focused setup
- Users needing handguard space for attachments while keeping a slim profile
- AR15 owners looking to extend practical distance with a 20-inch threaded barrel
Specifications
| Accuracy Description | High accuracy |
|---|---|
| Attachment System | ATLAS attachment system |
| Barrel Length | 20 in |
| Blade Finish | Black |
| Cartridge | 6.5 Grendel |
| Handguard | ATLAS R-ONE Handguard |
| Long Range Use | Proven results at 1000+ yards |
| Platform | AR15 |
| Product Type | Complete Upper Receiver |
| Recoil Description | Low recoil |
| Threaded | Yes |
Pros
- Complete upper receiver for an AR15 build in 6.5 Grendel.
- Designed around a low recoil, high accuracy cartridge.
- Includes Aero Precision’s ATLAS R-ONE handguard.
- Handguard offers attachment real estate while maintaining a slim profile.
- ATLAS attachment system is described as durable and dependable.
Considerations & Trade-offs
- Chambered in 6.5 Grendel, so this upper is purpose-built for that cartridge rather than a general-purpose 5.56 setup.
- The 20" barrel configuration favors a longer, more specialized build, which may be less compact than shorter upper options.
- The ATLAS R-ONE handguard is designed to stay slim while still offering attachment space, so accessory layout should be planned with that balance in mind.
- This is a complete upper receiver, so it is intended to be paired with a compatible lower and the rest of the rifle components.
Suggested Comparisons
- AR-15 complete upper receivers
- 6.5 Grendel barrels and uppers
- Free-float handguards
- Long-range AR-15 build components
Suggested Accessories
- AR-15 lower receiver
- 6.5 Grendel magazines
- Optic mount
- Backup iron sights
Frequently Asked Questions
What caliber is this assembled upper chambered in?
It is a 6.5 Grendel complete upper receiver for an AR15 build.
Does this upper come assembled or is it a parts kit?
The product is listed as an assembled upper receiver and described as a complete upper.
What handguard is included with this upper?
It includes Aero Precision's ATLAS R-ONE handguard.
What does the product information say about the ATLAS R-ONE handguard?
The description says the R-ONE is designed with size and weight in mind while still providing plenty of real estate for attachment needs.
What does the listing say about the ATLAS attachment system?
The proprietary ATLAS attachment system is described as a durable and dependable mounting platform that maintains a slim profile while providing strength and stability.