Rock River Arms Completed Upper Receiver A4 9MM Luger 16 Inch Barrel 1-10 Twist 1/2-36 Thread Free-Float Handguard Brake Black
$669.99 at MidwayUSA · 2 stores
In stock
Best price
$669.99at Brownells
Out of stock checked Oct 23, 2026
In stock now instead
- Rock River Arms Completed Upper Receiver A4 9MM Luger 16 Inch B… $669.99at MidwayUSA
- Matador Arms MAT-9 AR-9 9mm 7.825in Roller Delayed Upper Reciev… $575.00at OpticsPlanet
- Matador Arms MAT-9 AR-9 9mm 7.825in Roller Delayed Upper Reciev… $575.00at OpticsPlanet
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Brownells | $669.99checked Oct 23, 2026 | Out of stock | Buy at Brownells |
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.
Matador Arms MAT-9 AR-9 9mm 7.825in Roller Delayed Upper Reciever 4150 Lightweight Nitrided Barrel 1-10 Twist 1/2x28 Threads Anodized Black
$575.00 at OpticsPlanet
In stock Sale
Matador Arms MAT-9 AR-9 9mm 7.825in Roller Delayed Upper Reciever 4150 Lightweight Nitrided Barrel 1-10 Twist 1/2x28 Threads Anodized FDE
$575.00 at OpticsPlanet
In stock Sale
FM Products MIKE-9 9mm Build Kit 16 inch Mil-Spec Rear Charge 4-Port Micro Brake Black
$549.99 at OpticsPlanet
In stock Sale
Angstadt Arms Upper 9mm with 6" Barrel, Black
$539.00 at Ammunition Depot · 6 stores
In stock
Stern Defense AR-15 Upper Receiver 9mm 16.1in Barrel 15in MLOK Rail SD BU9 Bolt SD CH1 Charging Handle SCB 9 Comp Break Black 015-SD15INCHMOD4-KK
$534.45 at OpticsPlanet · 2 stores
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 | $669.99 | $669.99 | $669.99 |
Since Sep 28, 2026.
About this part
The Brn-9 Upper Receiver 9mm is a 9mm upper receiver from Brownells. One store lists it, Brownells at $669.99.
Fits and works with
- Caliber
- 9mm · Shop matching ammo
- Bolt
- 9mm · Bolt carrier groups
Specifications
- Manufacturer
- Brownells
- Platform
- AR-9
- Caliber
- 9mm
From the manufacturer
At last we have a BRNA(R) upper for pistol-caliber AR fans! The BRN-9 is a complete, dedicated upper receiver assembly chambered in 9mm Luger (9x19mm, 9mm Parabellum). In common with our BRN-180A(R) series, the BRN-9's blowback operating system is entirely self-contained. It does not use the AR-15 recoil buffer system, so it does not need a receiver extension, aka "buffer tube." It readily functions with a folding stock as an SBR (all NFA rules apply), and as a pistol it doesn't need the stubby buffer tube common to AR pistols. How does it work? The BRN-9's bolt is connected to a weight above it that reciprocates inside the receiver and works with the internal Mfg: Brownells
Rating
No ratings yet
Log in to rate this part.
Comments
Please log in to read and leave comments.