Brn-4 5.56mm 10.4" Heavy Bbl Complete Upper W/9" Handguard

Name: Brn-4 5.56mm 10.4" Heavy Bbl Complete Upper W/9" Handguard
Brand: Brownells
Availability: OutOfStock

Brownells · Upper Receiver

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Best price

$1,299.99at Brownells

Out of stock checked Oct 1, 2026

Buy at Brownells

Where to buy

Store	Price	Availability	Buy	Add to build
Brownells	$1,299.99checked Oct 1, 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.

Price history

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Dashed line = out of stock. Tracking since Sep 28, 2026.

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Store	Latest	Lowest	Highest
Brownells	$1,299.99	$1,299.99	$1,299.99

Since Sep 28, 2026.

About this part

The Brn-4 5.56mm 10.4" Heavy Bbl Complete Upper W/9" Handguard is an AR-15 complete upper receiver from Brownells. One store lists it, Brownells at $1,299.99.

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