K-Spec 5.56 NATO 13.9" Bbl 1-7 Twist Complete Upper Black

Name: K-Spec 5.56 NATO 13.9" Bbl 1-7 Twist Complete Upper Black
Brand: KAK Industry
Availability: OutOfStock

KAK Industry · Upper Receiver

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Best price

$599.99at Brownells

Out of stock checked Oct 1, 2026

Buy at Brownells

Where to buy

Store	Price	Availability	Buy	Add to build
Brownells	$599.99checked 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	$599.99	$599.99	$599.99

Since Sep 28, 2026.

About this part

The K-Spec 5.56 NATO 13.9" Bbl 1-7 Twist Complete Upper Black is an AR-15 complete upper receiver from KAK Industry. One store lists it, Brownells at $599.99.

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: 13.9" · Handguards

Specifications

Manufacturer: KAK Industry
Color: Black
Type: Complete
Platform: AR-15
Caliber: 5.56 mm NATO

From the manufacturer

Brownells and KAK Industry have partnered to build the best performing complete upper at an unbeatable price. This premium complete upper features a chrome-lined barrel, chrome-lined phosphate K-SPEC Enhanced BCG, Brownells-exclusive PentaComp muzzle device, and a rock-steady free-float KAK Industry MLOK handguard. 100% American made for years of dependable service. The K-SPEC Down Vent BCG represents unrivaled reliability, featuring Slotted Angled Carrier Rails, Dual Ejectors, and downward gas vents that redirect gas underneath the carrier instead of out at the shooter's face. For suppressed shooting with a traditional baffle can, the K-SPEC down vent BCG is a game-changer. Mfg: Kak Industry Llc.