Resolute Mk4 300BLK Assembl Upper 14.5"bbl W/P&W Brake BLK
$519.99 at OpticsPlanet · 3 stores
In stock Sale
M4E1-T M4E1 300BLK Assembled Upper 8"bbl Threaded W/Rm7.3" HG BLK
Aero Precision · Upper Receiver
No ratings yetBest price
$493.99at Kentucky Gun Co
Out of stock checked Oct 23, 2026
In stock now instead
- Resolute Mk4 300BLK Assembl Upper 14.5"bbl W/P&W Brake BLK $519.99at OpticsPlanet
- Resolute Mk4 300BLK Assembled Upper Rcvr 16.1" Bbl Black $452.49at Ammunition Depot
- WMD Guns AR-15 .300 Blackout 16in Free-Float M-LOK Complete Upp… $562.50at Ammunition Depot
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Kentucky Gun Co Best price | $493.99checked Oct 23, 2026 | Out of stock | Buy at Kentucky Gun Co | |
| Brownells | $499.99checked Oct 23, 2026 | Out of stock | Buy at Brownells | |
| OpticsPlanet | $534.99Salechecked Oct 23, 2026 | Out of stock | Buy at OpticsPlanet | |
| MidwayUSA | $534.99checked Oct 23, 2026 | Out of stock | Buy at MidwayUSA |
Prices and availability change often, so confirm on the store's site before you buy. We may earn a commission from these links.
Similar upper receivers in stock
This part is out of stock at every store we track. These similar upper receivers are in stock, with today's prices.
Resolute Mk4 300BLK Assembled Upper Rcvr 16.1" Bbl Black
$452.49 at Ammunition Depot · 5 stores
In stock
WMD Guns AR-15 .300 Blackout 16in Free-Float M-LOK Complete Upper Assembly Compensator NiB-X Nickel Silver
$562.50 at Ammunition Depot · 2 stores
In stock
Andro Corp Industries AR-15 Complete M-LOK Upper Receiver with Flash Hider Assembly .300BLK 16.5in 8in Barrel Medium Pistol Length 1-7 Twist 5/8x24
$399.99 at MidwayUSA · 3 stores
In stock
Andro Corp Industries AR-15 Complete M-LOK Upper Receiver with Flash Hider Assembly .300BLK 24.75in 16in Barrel Medium Pistol Length 1-7 Twist 5/8x24
$399.99 at MidwayUSA · 3 stores
In stock
ABC RIFLE COMPANY AR-15 .300 AAC Blackout Pistol 10in Quadrail Handguard Complete Upper Receiver w/BCG And Charging Handle Red
$369.99 at OpticsPlanet
In stock Sale
Price history
Dashed line = out of stock. Tracking since Sep 28, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Brownells | $499.99 | $499.99 | $499.99 |
| Kentucky Gun Co | $493.99 | $493.99 | $493.99 |
| MidwayUSA | $534.99 | $534.99 | $534.99 |
| OpticsPlanet | $534.99 | $534.99 | $534.99 |
Since Sep 28, 2026.
About this part
The M4E1-T M4E1 300BLK Assembled Upper 8"bbl Threaded W/Rm7.3" HG BLK is an AR-15 complete upper receiver from Aero Precision. It's sold by 4 stores, from $493.99 to $534.99.
Fits and works with
- Caliber
- 300 Blackout · Shop matching ammo
- Bolt
- Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
- Barrel length
- 8" · Handguards
Specifications
- Manufacturer
- Aero Precision
- Color
- Black
- Type
- Complete
- Platform
- AR-15
- Caliber
- 300 Blackout
From the manufacturer
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. Their 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. 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 m Mfg: Aero Precision
Rating
No ratings yet
Log in to rate this part.
Comments
Please log in to read and leave comments.