Retro Brn-601 5.56mm 20" Bbl Upper Receiver
$719.99 at Brownells
In stock Sale
Best price
$1,098.99at Brownells
Out of stock checked Oct 23, 2026
In stock now instead
- Retro Brn-601 5.56mm 20" Bbl Upper Receiver $719.99at Brownells
- Patriot Ordnance Factory P415 Edge 16.5" Complete Upper 5.56x45… $1,093.19at Kentucky Gun Co
- Mk114 Mod 1-M 223 Wylde 14.5" Bbl Complete Upper Thread Only $1,129.95at Ammunition Depot
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Brownells | $1,098.99checked 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.
Patriot Ordnance Factory P415 Edge 16.5" Complete Upper 5.56x45mm 1:8, Black
$1,093.19 at Kentucky Gun Co · 6 stores
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Mk114 Mod 1-M 223 Wylde 14.5" Bbl Complete Upper Thread Only
$1,129.95 at Ammunition Depot · 6 stores
In stock
Exclusive Mk1 Alpha LT 223 Wylde 14.5"bbl 11.5" MLOK Hdgd Kodiak Brown
$1,133.49 at Ammunition Depot · 3 stores
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Bilson Arms BA-15FC 5.56 NATO 16in Forward Complete Upper Assembly Standard Mid Length 1-7 Twist 1/2x28 A2 Flash Hider Nitride Graphite Black
$1,144.00 at OpticsPlanet
In stock Sale
Patriot Ordnance Factory Renegade Plus 10.5" Complete Upper 5.56x45mm 1:8, Black
$1,053.50 at Kentucky Gun Co · 5 stores
In stock
Price history
Dashed line = out of stock. Tracking since Sep 28, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Brownells | $1,098.99 | $1,098.99 | $1,098.99 |
Since Sep 28, 2026.
About this part
The Brn-4 Assembled Upper Receiver 14.5" Heavy Barrel Black is an AR-15 complete upper receiver from Brownells. One store lists it, Brownells at $1,098.99.
Fits and works with
- Caliber
- 5.56 / .223 · Shop matching ammo
- Bolt
- Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
- Barrel length
- 14.5" · Handguards
Specifications
- Manufacturer
- Brownells
- Color
- Black
- Type
- Complete
- Platform
- AR-15
- Caliber
- 5.56 mm NATO
From the manufacturer
Assembled from All New Components - Fits Standard AR-15 Lowers The BRN-4 Upper Receiver is now available as an Assembled Upper, with Barrel and Gas System installed. Simply add your preferred HKA(R) 416 compatible handguard and any 1/2-28 muzzle device, and you're ready to hit the range! Built from the ground up, the core of the BRN-4 Upper Receiver is an all new Bolt Carrier Group, featuring a slick nitride finish. The new BRN-4 barrel, produced by Faxon, is available in a variety of profiles and lengths to suit your needs. Barrels are chambered 5.56x45mm NATO, are button rifled with a 1-7 twist, 1/2-28 muzzle and come with the appropriate gas block for a given bar Mfg: Brownells
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