Radian Weapons 14.50" Complete Upper .223 Wylde 1:8, Black
$1,994.95 at Ammunition Depot · 4 stores
In stock
SR-15 KS-1 5.56 NATO 13.7" Bbl Assembled Upper Rcvr Black
Knights Armament · Upper Receiver
No ratings yetBest price
$1,983.60at Brownells
Out of stock checked Oct 23, 2026
In stock now instead
- Radian Weapons 14.50" Complete Upper .223 Wylde 1:8, Black $1,994.95at Ammunition Depot
- Radian Weapons 16" Complete Upper .223 Wylde 1:8, Black $2,029.95at Ammunition Depot
- DDM4V7 Pro 18" 5.56mm NATO 1-7 15" MFR XS M-LOK Rail Upper $1,588.56at MidwayUSA
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Brownells | $1,983.60checked 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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Price history
Dashed line = out of stock. Tracking since Sep 28, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| Brownells | $1,983.60 | $1,983.60 | $1,983.60 |
Since Sep 28, 2026.
About this part
The SR-15 KS-1 5.56 NATO 13.7" Bbl Assembled Upper Rcvr Black is an AR-15 complete upper receiver from Knights Armament. One store lists it, Brownells at $1,983.60.
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
- Knights Armament
- Color
- Black
- Type
- Complete
- Platform
- AR-15
- Caliber
- 5.56 mm NATO
From the manufacturer
KNIGHT'S ARMAMENT SR-15 KS-1 5.56 NATO ASSEMBLED UPPER RECEIVER The KS-1 features a 13.7" heavy profile ball-mill dimpled cold hammer forged barrel. This carbine allows a small, high efficiency suppressor to be attached and still maintain an overall length similar to a 10.3" barrel with a standard suppressor, but with significantly higher muzzle velocity. The heavy profile barrel resist heat-induced shift, maintaining point of impact throughout long-duration use. Ball mill dimpling aids in weight reduction while reducing heat-related shift effect that can be seen with traditional fluting. SPECS Barrel: 13.7", cold hammer forged, Mfg: Knights Armament
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