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
$633.24at MidwayUSA
Out of stock Sale checked Oct 22, 2026
In stock now instead
- Rock River Arms Completed Upper Receiver Coyote Carbine .223/5.… $645.99at MidwayUSA
- Rock River Arms Completed Upper Receiver National Match A4 .223… $649.99at OpticsPlanet
- Spikes Tactical .223 Rem/5.56 16" Barrel Complete Upper Assembl… $598.50at OpticsPlanet
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| MidwayUSA Best price | $633.24Salechecked Oct 22, 2026 | Out of stock | Buy at MidwayUSA | |
| OpticsPlanet | $709.99Salechecked Oct 21, 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.
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 | $633.24 | $633.24 | $633.24 |
| 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, from $633.24 to $709.99.
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
- 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
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