SR-15 E3 M-LOK AR-15 Upper Receiver Mod 2 16" URX 4

Name: SR-15 E3 M-LOK AR-15 Upper Receiver Mod 2 16" URX 4
Brand: Knights Armament
Availability: OutOfStock

Knights Armament · Upper Receiver

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Best price

$1,918.62at Brownells

Out of stock checked Oct 1, 2026

Buy at Brownells

Where to buy

Store	Price	Availability	Buy	Add to build
Brownells	$1,918.62checked 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	$1,918.62	$1,918.62	$1,918.62

Since Sep 28, 2026.

About this part

The SR-15 E3 M-LOK AR-15 Upper Receiver Mod 2 16" URX 4 is a 16" AR-15 upper receiver from Knights Armament. One store lists it, Brownells at $1,918.62.

Fits and works with

Barrel length: 16" · Handguards

Specifications

Manufacturer: Knights Armament
Platform: AR-15

From the manufacturer

Knight's Armament Company, or KAC, is known to many for their top tier, military issued rifles and parts. Brownells is proud to offer this line of Knight's Armament SR-15 MOD 2 complete upper receivers that allow you to easily complete a build or upgrade a rifle with battle proven quality. Built around a chrome lined, cold hammer forged barrel in your choice of 11.5", 14.5" 16" & 18" lengths with a Mod 2 gas block, and fitted with a KAC 3 prong QDC suppressor compatible flash hider. The Knight's Armament SR-15 MOD 2 complete upper receivers feature the URX M-LOK handguards that each have 2 anti-rotation QD sling swivel sockets and ev Mfg: Knights Armament