R-One M4E1-T 6.5 Grendel Assem Upper SPR 18"bbl Rifle Threaded FDE
Aero Precision · Upper Receiver
No ratings yetBest price
$579.99at Brownells
Out of stock checked Oct 2, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Brownells | $579.99checked Oct 2, 2026 | Out of stock | Buy at Brownells |
Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.
Price history
Dashed line = out of stock. Tracking since Sep 28, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Brownells | $579.99 | $579.99 | $579.99 |
Since Sep 28, 2026.
About this part
The R-One M4E1-T 6.5 Grendel Assem Upper SPR 18"bbl Rifle Threaded FDE is an AR-15 complete upper receiver from Aero Precision. One store lists it, Brownells at $579.99.
Fits and works with
- Caliber
- 6.5 Grendel · Shop matching ammo
- Bolt
- 6.5 Grendel / 6mm ARC · Bolt carrier groups
- Barrel length
- 18" · Handguards
Specifications
- Manufacturer
- Aero Precision
- Color
- Flat Dark Earth
- Type
- Complete
- Platform
- AR-15
- Caliber
- 6.5 Grendel
From the manufacturer
Upgrade the performance of your AR15 build with this 6.5 Grendel Complete Upper Receiver. Designed to be a low recoil/high accuracy cartridge, the 6.5 Grendel is ideal for those looking to stretch the legs of their AR15 rifle, with proven results at 1000+ yards. This complete upper includes Aero Precisions new ATLAS R-ONE Handguard! The R-ONE handguards are designed with size and weight in mind, while still providing plenty of real-estate to accommodate any attachment needs the end user may have. Aero Precisions proprietary ATLAS attachment system is a durable and dependable mounting platform, maintaining a slim profile while still providing the strength and stability customers have Mfg: Aero Precision
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