Spikes Tactical .223 Rem/5.56 16" Barrel Complete Upper Assembly, Mil-Spec Phosphate Coated, Black Mid-Length
$598.50 at OpticsPlanet · 5 stores
In stock Sale
K-Spec 5.56 NATO 13.9" Bbl 1-7 Twist Complete Upper Black
No ratings yetBest price
$599.99at Brownells
Out of stock checked Oct 23, 2026
In stock now instead
- Spikes Tactical .223 Rem/5.56 16" Barrel Complete Upper Assembl… $598.50at OpticsPlanet
- Rock River Arms Completed Upper Receiver Coyote Rifle .223 Wyld… $593.29at MidwayUSA
- Rock River Arms Completed Upper Receiver National Match A4 .223… $618.03at MidwayUSA
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Brownells | $599.99checked 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.
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This part is out of stock at every store we track. These similar upper receivers are in stock, with today's prices.
Rock River Arms Completed Upper Receiver Coyote Rifle .223 Wylde 20 Inch Barrel 1-9 Twist 1/2-28 Thread Free-Float Handguard Vortex Flash Hider Black
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Rock River Arms Completed Upper Receiver National Match A4 .223/5.56mm 20 Inch Barrel 1-8 Twist 1/2-28 Thread Free-Float Handguard w/Post 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 | $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.
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