Barrel Sub-Assembly 300 Blackout - 16.1" Bbl Sub-Assy Medium Taper 1-7 5/8-24" Black Nitride

Name: Barrel Sub-Assembly 300 Blackout - 16.1" Bbl Sub-Assy Medium Taper 1-7 5/8-24" Black Nitride
Brand: CMMG

CMMG · Barrels

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Barrel Sub-Assembly 300 Blackout - 16.1" Bbl Sub-Assy Medium Taper 1-7 5/8-24" Black Nitride

Best price

$193.99at Ammunition Depot

In stock Lowest in 30 dayschecked Nov 5, 2026

Buy at Ammunition Depot

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Fits and works with

Caliber: 300 Blackout · Shop matching ammo
Bolt: Standard AR-15 (5.56 / 300 BLK / .350 Legend) · Bolt carrier groups
Gas system: Carbine · Handguards
Muzzle thread: 5/8x24 · Muzzle devices
Barrel length: 16.1" · Handguards

Specifications

Manufacturer: CMMG
Color: Black
Platform: AR-15
Caliber: 300 Blackout
Gas system: Carbine
Barrel length: 16.1"
Thread pattern: 5/8 x 24

Where to buy

Store	Price	Availability	Buy
Ammunition Depot Best price	$193.99checked Nov 5, 2026	In stock	Buy at Ammunition Depot
GrabAGun	$189.99Salechecked Nov 13, 2026	Check store	Buy at GrabAGun
Classic Firearms	$190.61checked Nov 13, 2026	Check store	Buy at Classic Firearms
CMMG	$199.95checked Nov 13, 2026	Check store	Buy at CMMG
Palmetto State Armory	$202.99checked Nov 4, 2026	Check store	Buy at Palmetto State Armory
OpticsPlanet	$194.49Salechecked Nov 13, 2026	Out of stock	Buy at OpticsPlanet
Brownells 17.76% off · ends Nov 15 · exclusions apply	$215.38checked Nov 13, 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

Show

Lowest in-stock price in the last 30 days: $193.99 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	$224.99
Brownells	$215.38	$215.38	$215.38
CMMG	$199.95	$199.95	$199.95
Classic Firearms	$190.61	$190.61	$190.61
GrabAGun	$189.99	$189.99	$189.99
OpticsPlanet	$194.49	$194.49	$219.99
Palmetto State Armory	—	$202.99	$219.99

Since Sep 28, 2026.

About this part

The Barrel Sub-Assembly 300 Blackout - 16.1" Bbl Sub-Assy Medium Taper 1-7 5/8-24" Black Nitride is a 16.1" 300 Blackout barrel from CMMG with a carbine gas system. It's sold by 7 stores (1 in stock), from $189.99 to $215.38. The lowest in-stock price in the last 30 days was $193.99 at Ammunition Depot.

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 .300 Blackout 16.1" Barrel Length Medium Taper Contour Carbine Gas System Length 5/8-24 Threads 1-7 Barrel Twist Available in a Bead Blasted Stainless Steel or Salt Bath Nitride Finish Mfg: Cmmg