Rock River Arms Completed Upper Receiver X-1 .308/7.62x51mm 18 Inch Barrel 1-10 Twist 5/8-24 Threat Free-Float Handguard Brake Black
$974.99 at MidwayUSA · 2 stores
In stock
Rock River Arms Completed Upper Receiver Predator HP A4 .308/7.62X51mm NATO 20 Inch Barrel 1-10 Twist Free-Float Handguard Brake Black
Rock River Arms · Upper Receiver
No ratings yetFits and works with
- Caliber
- .308 / 7.62x51 · Shop matching ammo
- Bolt
- AR-10 (.308 / 6.5 CM) · Bolt carrier groups
- Gas system
- Mid-length · Handguards
- Barrel length
- 2E+1" · Handguards
Specifications
- Manufacturer
- Rock River Arms
- Color
- Black
- Type
- Complete
- Platform
- AR-10
- Caliber
- .308 / 7.62
- Gas system
- Mid
- Twist rate
- 1:10
- Length
- 17"
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| MidwayUSA Best price | $980.99checked Nov 13, 2026 | In stock | Buy at MidwayUSA | |
| OpticsPlanet | $899.99Salechecked Nov 13, 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: $925.12 at MidwayUSA. Dashed line = out of stock. Tracking since Oct 16, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| MidwayUSA | $980.99 | $925.12 | $980.99 |
| OpticsPlanet | $899.99 | $899.99 | $899.99 |
Since Oct 16, 2026.
About this part
The Rock River Arms Completed Upper Receiver Predator HP A4 .308/7.62X51mm NATO 20 Inch Barrel 1-10 Twist Free-Float Handguard Brake Black is an AR-10 complete upper receiver from Rock River Arms. It's sold by 2 stores (1 in stock), from $899.99 to $980.99. The lowest in-stock price in the last 30 days was $925.12 at MidwayUSA.
From the manufacturer
Rock River Arms Completed Upper Receiver Predator HP A4 .308/7.62X51mm NATO 20 Inch Barrel 1-10 Twist Free-Float Handguard Brake Black. 308/7.62X51mm NATO Completed Upper. Formulated by using several of the most robust and long lasting resources available these AR15 Upper Receivers via Rock River Arms provides you with a product that will give you numerous years of reliability. Rock River Arms has been generating high quality products for a number of years and the Rock River Arms Predator HP A4 .308/7.62X51mm NATO Completed Upper is their manner of revealing just how much they are concerned. At OpticsPlanet we ensure that it is our responsibility to receive the most suitable product for your preferences and showcasing the Rock River Arms Predator HP A4 .308/7.62X51mm NATO Completed Upper is something that we're happy to offer. Specifications for Rock River Arms Predator HP A4 .308/7.62X51mm NATO Completed Upper: Manufacturer: Rock River Arms Caliber: 7.62x51mm NATO .308 Winchester Barrel Profile: Standard Gas System Length: Mid Length Barrel Twist Rate: 1-10 Handguard Type: Free-Float Muzzle Device: Brake Finish: Anadized Color: Black Gas Block Journal Size-Diameter: .750 in Handguard Length: 17 in Gun Rail: Full Top Rail Barrel Material: 416R Stainless Steel Bolt Carrier Group Included: COM-SPEC Magazine Included: No Mount Type: M-LOK Package Contents: Rock River Arms Predator HP A4 .308/7.62X51mm NATO Completed Upper Bolt Carrier Group Charging Handle Assembly Rock River Arms 308A0567: Completed Upper Receiver Predator HP A4 .308/7.62X51mm NATO 20 Inch Barrel 1-10 Twist Free-Float Handguard Brake Black
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