Rock River Arms Completed Upper Receiver A4 .223/5.56mm 10.5 Inch Barrel 1-7 Twist 1/2-28 Thread R4 Handguard A2 Flash Hide Black
Rock River Arms · Upper Receiver
No ratings yetBest price
$529.99at OpticsPlanet
Out of stock Sale checked Oct 21, 2026
In stock now instead
- Rock River Arms Completed Upper Receiver Elite Carbine A4 .223/… $527.00at MidwayUSA
- Rock River Arms Completed Pistol Upper Receiver A4 .223/5.56mm … $488.99at MidwayUSA
- Spikes Tactical .223 Rem/5.56 16" Barrel Complete Upper Assembl… $567.00at OpticsPlanet
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| OpticsPlanet Best price | $529.99Salechecked Oct 21, 2026 | Out of stock | Buy at OpticsPlanet | |
| MidwayUSA | $570.00checked Oct 22, 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.
Price history
Dashed line = out of stock. Tracking since Oct 16, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| MidwayUSA | $570.00 | $570.00 | $570.00 |
| OpticsPlanet | $529.99 | $529.99 | $529.99 |
Since Oct 16, 2026.
About this part
The Rock River Arms Completed Upper Receiver A4 .223/5.56mm 10.5 Inch Barrel 1-7 Twist 1/2-28 Thread R4 Handguard A2 Flash Hide Black is an AR-15 complete upper receiver from Rock River Arms. It's sold by 2 stores, from $529.99 to $570.00.
Fits and works with
- Caliber
- 5.56 / .223 · Shop matching ammo
- Bolt
- Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
- Muzzle thread
- 1/2x28 · Muzzle devices
- Barrel length
- 10.5" · Handguards
Specifications
- Manufacturer
- Rock River Arms
- Color
- Black
- Type
- Complete
- Platform
- AR-15
- Caliber
- 5.56 mm NATO
From the manufacturer
Rating
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