Assembled M4-Exo 300 AAC Blackout 13.9" Bbl 13" Exo3 Rail W/Nox Brake

Name: Assembled M4-Exo 300 AAC Blackout 13.9" Bbl 13" Exo3 Rail W/Nox Brake
Brand: Sons Of Liberty Gun Works
Availability: OutOfStock

Sons Of Liberty Gun Works · Upper Receiver

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Best price

$855.00at Brownells

Out of stock checked Oct 1, 2026

Buy at Brownells

Where to buy

Store	Price	Availability	Buy	Add to build
Brownells	$855.00checked 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	$855.00	$855.00	$855.00

Since Sep 28, 2026.

About this part

The Assembled M4-Exo 300 AAC Blackout 13.9" Bbl 13" Exo3 Rail W/Nox Brake is an AR-15 complete upper receiver from Sons Of Liberty Gun Works. One store lists it, Brownells at $855.00.

Fits and works with

Caliber: 300 Blackout · Shop matching ammo
Bolt: Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
Barrel length: 13.9" · Handguards
Handguard length: 13" · Barrels

Specifications

Manufacturer: Sons Of Liberty Gun Works
Type: Complete
Platform: AR-15
Caliber: 300 Blackout

From the manufacturer

The SOLGW M4-EXO3 Upper Half comes with SOLGW's Combat Barrel and EXO3 Rail, and is available in 13.9" 300blk with pinned and welded NOX brake to bring OAL to over 16" No BCG or C/H. Mfg: Sons Of Liberty Gun Works