AR15 16" 5.56 Barrel 4140 MT
$176.99 at Ammunition Depot · 5 stores
In stock
Best price
$174.95at CMMG
checked Oct 22, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| CMMG Best price | $174.95checked Oct 22, 2026 | Check store | Buy at CMMG | |
| OpticsPlanet | $179.99Salechecked 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
Dashed line = out of stock. Tracking since Oct 17, 2026.
Show the prices as a table
| Store | Latest | Lowest | Highest |
|---|---|---|---|
| CMMG | $174.95 | $174.95 | $174.95 |
| OpticsPlanet | $179.99 | $179.99 | $179.99 |
Since Oct 17, 2026.
About this part
The CMMG Barrel Sub-Assm 10.5in MT 4140CM Salt Bath Nitride 5.56mm is a 10.5" 5.56 / .223 barrel from CMMG with a carbine gas system. It's sold by 2 stores, from $174.95 to $179.99.
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
- Muzzle thread
- 1/2x28 · Muzzle devices
- Barrel length
- 10.5" · Handguards
Specifications
- Manufacturer
- CMMG
- Platform
- AR-15
- Caliber
- 5.56 mm NATO
- Gas system
- Carbine
- Barrel length
- 10.5"
- Thread pattern
- ½ x 28
From the manufacturer
CMMG Barrel Sub-Assm 10.5in MT 4140CM Salt Bath Nitride 5.56mm. The 10.5 5.56mm barrel is no exception. Rest assured that all barrel sub-assemblies are properly headspaced and perfect for your next AR build. Specifications for CMMG AR 5.56mm 10.5in Barrel Sub-Assm: Manufacturer: CMMG Finish: Salt Bath Nitride Fabric/Material: 4140 Steel Caliber: 5.56x45mm NATO Barrel Length: 10.5 in Barrel Profile: Medium Tapered Gas System Length: Carbine Length Gas Block Journal Size-Diameter: .750 in Barrel Twist Rate: 1-7 Flutes: No Gun Make: CMMG Weight: 0.9 lb Firearms Threads Per Inch: 1/2x28 Package Contents: CMMG AR 5.56mm 10.5in Barrel Sub-Assm CMMG 55D8D0A: Barrel Sub-Assm 10.5in MT 4140CM Salt Bath Nitride 5.56mm
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