Barrel Sub-Assembly 5.56mm - 16.1" Bbl Sub-Assy LT 1-7 1/2-28" Black Nitride

Name: Barrel Sub-Assembly 5.56mm - 16.1" Bbl Sub-Assy LT 1-7 1/2-28" Black Nitride
Brand: CMMG
Availability: InStock

CMMG · Barrels

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Best price

$169.99at OpticsPlanet

In stock Sale checked Oct 1, 2026

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Where to buy

Store	Price	Availability	Buy	Add to build
OpticsPlanet Best price	$169.99Salechecked Oct 1, 2026	In stock	Buy at OpticsPlanet
Brownells	$132.99checked 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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Lowest in-stock price in the last 30 days: $169.99 at OpticsPlanet. Dashed line = out of stock. Tracking since Sep 28, 2026.

Show the prices as a table

Store	Latest	Lowest	Highest
Brownells	$132.99	$132.99	$132.99
OpticsPlanet	$169.99	$169.99	$169.99

Since Sep 28, 2026.

About this part

The Barrel Sub-Assembly 5.56mm - 16.1" Bbl Sub-Assy LT 1-7 1/2-28" Black Nitride is a 16.1" 5.56 / .223 barrel from CMMG with a carbine gas system. It's sold by 2 stores (1 in stock), from $132.99 to $169.99. The lowest in-stock price in the last 30 days was $169.99 at OpticsPlanet.

Fits and works with

Caliber: 5.56 / .223 · Shop matching ammo
Bolt: Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
Gas system: Carbine · Handguards
Muzzle thread: 1/2x28 · Muzzle devices
Barrel length: 16.1" · Handguards

Specifications

Manufacturer: CMMG
Color: Black
Platform: AR-15
Caliber: 5.56 mm NATO
Gas system: Carbine
Barrel length: 16.1"
Thread pattern: ½ x 28

From the manufacturer

Perfect for building your custom AR15 upper group. Comes with a properly installed M4 barrel extension. All barrel sub-assemblies are properly headspaced. Chambered in 5.56mm 16.1" Barrel Length M4 and Lightweight Tapers Carbine Gas System Length A 1/2-28 Threads 1-7 Barrel Twist Salt Bath Nitride Finish Mfg: Cmmg