Brn-15 5.56mm 13.7" Bbl .750" Gas Block Upper Receiver

Name: Brn-15 5.56mm 13.7" Bbl .750" Gas Block Upper Receiver
Brand: Brownells
Availability: InStock

Brownells · Upper Receiver

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Best price

$319.99at Brownells

In stock Sale checked Oct 1, 2026

Buy at Brownells

Where to buy

Store	Price	Availability	Buy	Add to build
Brownells	$319.99Salechecked Oct 1, 2026	In 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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Lowest in-stock price in the last 30 days: $319.99 at Brownells. Dashed line = out of stock. Tracking since Sep 27, 2026.

Show the prices as a table

Store	Latest	Lowest	Highest
Brownells	$319.99	$319.99	$319.99

Since Sep 27, 2026.

About this part

The Brn-15 5.56mm 13.7" Bbl .750" Gas Block Upper Receiver is a 13.7" 5.56 / .223 upper receiver from Brownells. One store lists it, Brownells at $319.99. The lowest in-stock price in the last 30 days was $319.99 at Brownells.

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: 13.7" · Handguards

Specifications

Manufacturer: Brownells
Platform: AR-15
Caliber: 5.56 mm NATO
Barrel length: 13.7"

From the manufacturer

Manufactured in the US with the highest quality components, the BRN-15 Upper Receiver Groups are great starts for your next build. Pick your preferred bolt carrier group and charging handle to complete. The BRN-15 Upper Receiver Groups feature a 5.56x45mm NATO chambered, nitride finished barrel, available in several popular lengths. Models are available in a Government, medium profile barrel, with the 16 inch also available in a lightweight contour. Barrels feature a gas block dimple, that the rear gas block screw securely engages. All barrels are stress releived. Unique MLOK handguard extends past the gas block, to provide as much usable real estate as possible. Anti-rotation t Mfg: Brownells