Rock River Arms Completed Upper Receiver R3 .223/5.56mm 18 Inch Barrel Mid-Length Plofile 1-8 Twist 1/2-28 Thread M-LOK Handguard Brake Black
Rock River Arms · Upper Receiver
No ratings yetBest price
$754.99at MidwayUSA
In stock checked Nov 12, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| MidwayUSA Best price | $754.99checked Nov 12, 2026 | In stock | Buy at MidwayUSA | |
| OpticsPlanet | $709.99Salechecked Nov 12, 2026 | Out of stock | Buy at OpticsPlanet |
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
Lowest in-stock price in the last 30 days: $754.99 at MidwayUSA. Dashed line = out of stock. Tracking since Oct 16, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| MidwayUSA | $754.99 | $633.24 | $754.99 |
| OpticsPlanet | $709.99 | $709.99 | $709.99 |
Since Oct 16, 2026.
About this part
The Rock River Arms Completed Upper Receiver R3 .223/5.56mm 18 Inch Barrel Mid-Length Plofile 1-8 Twist 1/2-28 Thread M-LOK Handguard Brake Black is an AR-15 complete upper receiver from Rock River Arms. It's sold by 2 stores (1 in stock), from $709.99 to $754.99. The lowest in-stock price in the last 30 days was $754.99 at MidwayUSA.
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
- Muzzle thread
- 1/2x28 · Muzzle devices
- Barrel length
- 18" · Handguards
Specifications
- Manufacturer
- Rock River Arms
- Color
- Black
- Type
- Complete
- Platform
- AR-15
- Caliber
- 5.56 mm NATO
From the manufacturer
Similar upper receivers
Rating
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