CMMG MT 4140CM SBN 8.6 Blackout Threaded Barrel 16.1 inch

Name: CMMG MT 4140CM SBN 8.6 Blackout Threaded Barrel 16.1 inch
Brand: CMMG

CMMG · Barrels

No ratings yet

Best price

$274.95at CMMG

checked Oct 22, 2026

Buy at CMMG

Compare 2 stores

Where to buy

Store	Price	Availability	Buy	Add to build
CMMG Best price	$274.95checked Oct 22, 2026	Check store	Buy at CMMG
OpticsPlanet	$249.99Salechecked Oct 22, 2026	Out of stock	Buy at OpticsPlanet

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

Dashed line = out of stock. Tracking since Oct 17, 2026.

Show the prices as a table

Store	Latest	Lowest	Highest
CMMG	$274.95	$274.95	$274.95
OpticsPlanet	$249.99	$249.99	$249.99

Since Oct 17, 2026.

About this part

The CMMG MT 4140CM SBN 8.6 Blackout Threaded Barrel 16.1 inch is a 16.1" .308 / 7.62x51 barrel from CMMG. It's sold by 2 stores, from $249.99 to $274.95.

Fits and works with

Caliber: .308 / 7.62x51 · Shop matching ammo
Bolt: AR-10 (.308 / 6.5 CM) · Bolt carrier groups
Muzzle thread: 5/8x24 · Muzzle devices
Barrel length: 16.1" · Handguards

Specifications

Manufacturer: CMMG
Platform: AR-10
Caliber: .308 / 7.62
Barrel length: 16.1"
Thread pattern: 5/8 x 24

From the manufacturer

CMMG MT 4140CM SBN 8.6 Blackout Threaded Barrel 16.1 inch. 6 Blackout AR pistol or SBR build with a CMMG 12.5" barrel featuring our sleek corrosion-resistant nitride finish. Compatible with CMMG Mk3 and DPMS Gen 1 High-Pattern LR-308 upper receivers. Accepts 0.750" diameter gas blocks. Specifications for CMMG AR 8.6mm Blackout Threaded Barrel: Manufacturer: CMMG Color: Black Finish: Nitride Caliber: 8.6mm Blackout Barrel Twist Rate: 1-3 Barrel Material: 4140 Chrome Moly Vanadium Gun Make: CMMG Gun Type: Rifle Firearms Threads Per Inch: 5/8x24 Package Contents: CMMG AR 8.6mm Blackout Threaded Barrel CMMG 33D190C: MT 4140CM SBN 8.6 Blackout Threaded Barrel 16.1 inch