SR-15 KS-1 5.56 NATO 13.7" Bbl Assembled Upper Rcvr Black

Name: SR-15 KS-1 5.56 NATO 13.7" Bbl Assembled Upper Rcvr Black
Brand: Knights Armament

Knights Armament · Upper Receiver

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SR-15 KS-1 5.56 NATO 13.7" Bbl Assembled Upper Rcvr Black

Best price

$1,983.60at AR15Discounts

checked Nov 14, 2026

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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

Compatibility

Caliber: 5.56 mm NATO
Platform: AR-15

Dimensions and weight

Barrel length: 13.7"

Materials and features

Type: Complete
Color: Black

Where to buy

Store	Price	Availability	Buy
AR15Discounts Best price 5% off	$1,983.60checked Nov 14, 2026	Check store	Buy at AR15Discounts
Dirty Bird	$1,983.60checked Nov 14, 2026	Check store	Buy at Dirty Bird
Brownells 17.76% off · ends Nov 15 · exclusions apply	$1,983.60checked Nov 14, 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.

Show the prices as a table

Store	Latest	Lowest	Highest
AR15Discounts	$1,983.60	$1,983.60	$1,983.60
Brownells	$1,983.60	$1,983.60	$1,983.60
Dirty Bird	$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. It's sold by 3 stores, all at $1,983.60.

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