AR15 16" 5.56 Barrel 4140 MT

Name: AR15 16" 5.56 Barrel 4140 MT
Brand: CMMG
Availability: InStock

CMMG · Barrels

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Best price

$176.99at Ammunition Depot

In stock Lowest in 30 dayschecked Nov 13, 2026

Buy at Ammunition Depot

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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
Muzzle thread: 1/2x28 · Muzzle devices
Barrel length: 16" · Handguards

Specifications

Manufacturer: CMMG
Platform: AR-15
Caliber: 5.56 mm NATO
Barrel length: 16"
Twist rate: 1:7
Thread pattern: ½ x 28

Where to buy

Store	Price	Availability	Buy
Ammunition Depot Best price	$176.99checked Nov 13, 2026	In stock	Buy at Ammunition Depot
OpticsPlanet	$187.99Salechecked Nov 12, 2026	In stock	Buy at OpticsPlanet
GrabAGun	$189.99Salechecked Nov 12, 2026	Check store	Buy at GrabAGun
Classic Firearms	$190.61checked Nov 12, 2026	Check store	Buy at Classic Firearms
Palmetto State Armory	$197.99checked Nov 13, 2026	Check store	Buy at Palmetto State Armory
CMMG	$199.95checked Nov 13, 2026	Check store	Buy at CMMG
Natchez	$222.99checked Nov 12, 2026	Check store	Buy at Natchez
Brownells	Check priceprice on the store's site	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

Show

Lowest in-stock price in the last 30 days: $176.99 at Ammunition Depot. Dashed line = out of stock. Tracking since Sep 28, 2026.

Show the prices as a table

Store	Latest	Lowest	Highest
Ammunition Depot	$176.99	$176.99	$176.99
CMMG	$199.95	$199.95	$199.95
Classic Firearms	$190.61	$190.61	$190.61
GrabAGun	$189.99	$189.99	$189.99
Natchez	$222.99	$222.99	$222.99
OpticsPlanet	$187.99	$187.99	$226.49
Palmetto State Armory	$197.99	$197.99	$197.99

Since Sep 28, 2026.

About this part

The AR15 16" 5.56 Barrel 4140 MT is a 16" 5.56 / .223 barrel from CMMG. It's sold by 7 stores (2 in stock), from $176.99 to $222.99. The lowest in-stock price in the last 30 days was $176.99 at Ammunition Depot.

From the manufacturer

Excellent Balance Between Strength & Weight Savings

Chambered in 5.56mm NATO, these medium profile barrels feature a 1-7 twist with 1/2"-28 muzzle threads, and accept .750" diameter gas blocks. Barrels are available in either 416 stainless steel or 4140 chrome moly steel with a nitride finish.Select either a 12.5" barrel with a carbine length gas system, 16" barrel mid-length gas system, or an 18" barrel with rifle length gas system.

AR-15, Issue:11, Page:018
Big Book Catalog, Issue:70, Page:017