CMMG 5.56mm Non-Threaded Barrel 16.1in Empire Profile 55D 4140CM SBN Sub-Assm Black
No ratings yetBest price
$175.99at OpticsPlanet
In stock Sale checked Nov 12, 2026
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
| Store | Price | Availability | Buy | Add 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
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| 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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