Aero Precision M4E1 Threaded Complete Upper Receiver 5.56 16in Mid-Length Barrel 1-7 Twist 15in ATLAS R-ONE Handguard A2 Flash Hider Cerakote OD Green
$569.99 at OpticsPlanet · 2 stores
In stock Sale
Assembled M4E1 5.56 Assm Uppr 16" Mid-Len 12" M-LOK Atlas S-One HG BLK
Aero Precision · Upper Receiver
No ratings yetBest price
$489.99at Brownells
Out of stock checked Oct 23, 2026
In stock now instead
- Aero Precision M4E1 Threaded Complete Upper Receiver 5.56 16in … $569.99at OpticsPlanet
- Resolute Mk4 5.56 NATO Assembled Upper Rcvr 16.1" Bbl Black $489.99at OpticsPlanet
- Rock River Arms Completed Pistol Upper Receiver A4 .223/5.56mm … $488.99at MidwayUSA
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Brownells | $489.99checked Oct 23, 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.
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Price history
Dashed line = out of stock. Tracking since Sep 28, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Brownells | $489.99 | $489.99 | $489.99 |
Since Sep 28, 2026.
About this part
The Assembled M4E1 5.56 Assm Uppr 16" Mid-Len 12" M-LOK Atlas S-One HG BLK is an AR-15 complete upper receiver from Aero Precision. One store lists it, Brownells at $489.99.
Fits and works with
- Caliber
- 5.56 / .223 · Shop matching ammo
- Bolt
- Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
- Gas system
- Mid-length · Handguards
- Barrel length
- 16" · Handguards
- Handguard length
- 12" · Barrels
Specifications
- Manufacturer
- Aero Precision
- Color
- Black
- Type
- Complete
- Platform
- AR-15
- Caliber
- 5.56 mm NATO
From the manufacturer
This complete upper includes Aero Precision's new ATLAS S-ONE Handguard! The S-ONE line of handguards are designed with size and weight in mind, providing the perfect addition to your lightweight build. Aero Precision's proprietary ATLAS attachment system is a durable and dependable mounting platform, maintaining a slim profile while still providing the strength and stability customers have grown to love from Aero Precision handguards. M4E1 Threaded Assembled Upper Receiver Choice of 12" or 15" M-LOK ATLAS S-ONE Handguard 16" 5.56 Mid CMV Barrel, 18" Rifle Barrel Low Profile Gas Block and Mid-Length/Rifle Length Gas Tube Dependi Mfg: Aero Precision
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