Assembled M4-L89 5.56x45 NATO 13.9"bbl 13.75" L89 Rail W/ASR

Name: Assembled M4-L89 5.56x45 NATO 13.9"bbl 13.75" L89 Rail W/ASR
Brand: Sons Of Liberty Gun Works
Availability: OutOfStock

Sons Of Liberty Gun Works · Upper Receiver

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Best price

$1,116.25at Brownells

Out of stock checked Oct 1, 2026

Buy at Brownells

Where to buy

Store	Price	Availability	Buy	Add to build
Brownells	$1,116.25checked 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	$1,116.25	$1,116.25	$1,116.25

Since Sep 28, 2026.

About this part

The Assembled M4-L89 5.56x45 NATO 13.9"bbl 13.75" L89 Rail W/ASR is an AR-15 complete upper receiver from Sons Of Liberty Gun Works. One store lists it, Brownells at $1,116.25.

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
Handguard length: 13.75" · Barrels

Specifications

Manufacturer: Sons Of Liberty Gun Works
Type: Complete
Platform: AR-15
Caliber: 5.56 mm NATO

From the manufacturer

The SOLGW M4-L89 Upper Half comes with SOLGW's Cold Hammer Forged version of their Combat Barrel and L89 Rail, and is available in 10.5", 11.5", 13.7", 13.9" and 14.5" 5.56, with Huxwrx, NOX or ASR muzzle devices. No BCG or C/H * 13.7", 13.9", and 14.5" barrels come pinned and welded flash hiders for OAL of 16"* Mfg: Sons Of Liberty Gun Works