OE-SPEC 300 Blackout- 13.9" AR15 Barrel- Carbine Gas, Nitride

Name: OE-SPEC 300 Blackout- 13.9" AR15 Barrel- Carbine Gas, Nitride
Brand: KAK Industry

KAK Industry · Barrels

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$129.95at KAK Industry

checked Oct 8, 2026

Buy at KAK Industry

Where to buy

Store	Price	Availability	Buy	Add to build
KAK Industry	$129.95checked Oct 8, 2026	Check store	Buy at KAK Industry

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Dashed line = out of stock. Tracking since Oct 6, 2026.

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Store	Latest	Lowest	Highest
KAK Industry	$129.95	$129.95	$129.95

Since Oct 6, 2026.

About this part

The OE-SPEC 300 Blackout- 13.9" AR15 Barrel- Carbine Gas, Nitride is a 13.9" 300 Blackout barrel from KAK Industry with a carbine gas system. One store lists it, KAK Industry at $129.95.

Fits and works with

Caliber: 300 Blackout · Shop matching ammo
Bolt: Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
Gas system: Carbine · Handguards
Muzzle thread: 5/8x24 · Muzzle devices
Barrel length: 13.9" · Handguards

Specifications

Manufacturer: KAK Industry
Platform: AR-15
Caliber: 300 Blackout
Gas system: Carbine
Barrel length: 13.9"
Twist rate: 1:7
Thread pattern: 5/8 x 24

From the manufacturer

300 Blackout 13.9" Carbine Gas AR15 Barrel* Chamber- 300 BLK* Length- 13.9"* Gas- system Carbine* Gas Block Size- 750* Threads- 5/8x24* Finish- Nitride* Twist- 1:7* Material 5R - 41V50 Chrome Moly Vanadium* Treatment- Nitride * Barrel dimpled for gas block set screw* Extension- M4* Marked for Caliber and Twist* Fully Made In House From KAK Industry Produced Blanks As a high volume contract manufacturer for the firearms industry, KAK is able to leverage its machining capacity to bring the same quality parts that we provide to some of the biggest names in the industry, straight to the retail customer. We manufacture our barrels from the raw material all the way to the complete product, all under our own roof. Our barrels are fully inspected through the entire process, including air-gauging the bores, physical measurements of the threads and outer diameters, and 100% gauging of the headspace tolerance. Our OE-Spec line provides you with the quality you demand and the value you desire.