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CMMG 5.56mm Non-Threaded Barrel 16.1in Empire Profile 55D 4140CM SBN Sub-Assm Black

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CMMG 5.56mm Non-Threaded Barrel 16.1in Empire Profile 55D 4140CM SBN Sub-Assm Black

Best price

$175.99at OpticsPlanet

In stock Sale checked Nov 12, 2026

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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
Gas system
Carbine · Handguards
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"
Twist rate
1:7

Where to buy

StorePriceAvailabilityBuyAdd to build
OpticsPlanet Best price $175.99Salechecked Nov 12, 2026 In stock Buy at OpticsPlanet
CMMG $199.95checked Nov 13, 2026 Check store Buy at CMMG

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

Lowest in-stock price in the last 30 days: $175.99 at OpticsPlanet. Dashed line = out of stock. Tracking since Oct 17, 2026.

Show the prices as a table
StoreLatestLowestHighest
CMMG$199.95$199.95$199.95
OpticsPlanet$175.99$175.99$195.99

Since Oct 17, 2026.

About this part

The CMMG 5.56mm Non-Threaded Barrel 16.1in Empire Profile 55D 4140CM SBN Sub-Assm Black 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 $175.99 to $199.95. The lowest in-stock price in the last 30 days was $175.99 at OpticsPlanet.

From the manufacturer

CMMG 5.56mm Non-Threaded Barrel 16.1in Empire Profile 55D 4140CM SBN Sub-Assm Black. 1" Empire Profile barrel sub-assembly is engineered for 5.56mm featuring a medium-taper design crafted from 4140 Chrome-Moly steel with a durable Salt Bath Nitride (SBN) finish. The barrel incorporates an unthreaded muzzle with a recessed target crown. This configuration was specifically developed to provide a reliable option for areas with specific firearm regulations while maintaining CMMG's standards for accuracy and durability. Specifications for CMMG 5.56mm Non-Threaded Barrel: Manufacturer: CMMG Color: Black Finish: Anodized Caliber: 5.56mm Barrel Length: 16.1 in Barrel Material: 4140 Chrome Moly Vanadium Gas System Length: Carbine Length Barrel Twist Rate: 1-7 Flutes: No Gun Make: CMMG Gun Model: CMMG Mk4 Threads per Inch: Non Threaded Gun Type: Rifle Features of CMMG 5.56mm Non-Threaded Barrel 16.1" barrel length 5.56mm chambering 4140CM steel construction Salt Bath Nitride finish Unthreaded muzzle design Recessed target crown Medium taper Empire Profile Package Contents: CMMG 5.56mm Non-Threaded Barrel What firearm models does the manufacturer say CMMG 5.56mm Non-Threaded Barrel is compatible with? The manufacturer says that CMMG 5.56mm Non-Threaded Barrel is compatible with CMMG Mk4CMMG 55DF40B: 5.56mm Non-Threaded Barrel 16.1in Empire Profile 55D 4140CM SBN Sub-Assm Black

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