Retro Brn-601 5.56mm 20" Bbl Upper Receiver
$719.99 at Brownells
In stock Sale
Best price
$1,309.99at Brownells
Out of stock checked Oct 23, 2026
In stock now instead
- Retro Brn-601 5.56mm 20" Bbl Upper Receiver $719.99at Brownells
- Blackout Defense Complete Dual Taper Lock .223 Wylde Upper Rece… $1,294.99at OpticsPlanet
- AR-15 Super Duty Mod1 5.56x45 16" Bbl Complete Upper Black $1,325.00at Brownells
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Brownells | $1,309.99checked 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.
Blackout Defense Complete Dual Taper Lock .223 Wylde Upper Receiver Group Slick Side 13.9in Mid Black
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Price history
Dashed line = out of stock. Tracking since Sep 28, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Brownells | $1,309.99 | $1,309.99 | $1,309.99 |
Since Sep 28, 2026.
About this part
The Brn-4 5.56mm 10.4" Med Bbl Complete Upper W/9" Handguard is an AR-15 complete upper receiver from Brownells. One store lists it, Brownells at $1,309.99.
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
- 10.4" · Handguards
- Handguard length
- 9" · Barrels
Specifications
- Manufacturer
- Brownells
- Type
- Complete
- Platform
- AR-15
- Caliber
- 5.56 mm NATO
From the manufacturer
Assembled from All New Components, Now with Handguard and Muzzle Device The BRN-4A(R) Upper Receiver is now available as a Complete Upper, with Handguard, Muzzle Device, Barrel and Gas System installed. Simply attach to your AR-15 lower receiver and you're ready to hit the range! These complete uppers have the option of shipping with a shorter barrel configuration, with a 9 inch Midwest Industries handguard, or on the longer length barrel models, a 13.5 inch Midwest Industries handguard. The handguards feature plentiful MLOK attachment point, as well as a full length picatinny rail. Built from the ground up, the core of the BRN-4A(R) Upper Receiver is an all new Bol Mfg: Brownells
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