AR15 16" 5.56 Barrel 4140 MT
$176.99 at Ammunition Depot · 5 stores
In stock
Barrel Sub-Assembly 5.56mm - 16.1" Bbl Sub-Assy M4 1-7 1/2-28" Black Nitride
No ratings yetBest price
$176.99at Ammunition Depot
In stock checked Oct 21, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Ammunition Depot Best price | $176.99checked Oct 21, 2026 | In stock | Buy at Ammunition Depot | |
| OpticsPlanet | $199.49Salechecked Oct 21, 2026 | In stock | Buy at OpticsPlanet | |
| Palmetto State Armory | $188.99checked Oct 21, 2026 | Check store | Buy at Palmetto State Armory | |
| CMMG | $199.95checked Oct 21, 2026 | Check store | Buy at CMMG | |
| Brownells | $112.49Salechecked Oct 21, 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
Lowest in-stock price in the last 30 days: $176.99 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 | $176.99 | $176.99 |
| Brownells | $112.49 | $112.49 | $112.49 |
| CMMG | $199.95 | $199.95 | $199.95 |
| OpticsPlanet | $199.49 | $199.49 | $199.49 |
| Palmetto State Armory | $188.99 | $188.99 | $188.99 |
Since Sep 28, 2026.
About this part
The Barrel Sub-Assembly 5.56mm - 16.1" Bbl Sub-Assy M4 1-7 1/2-28" Black Nitride is a 16.1" 5.56 / .223 barrel from CMMG with a carbine gas system. It's sold by 5 stores (2 in stock), from $112.49 to $199.95. The lowest in-stock price in the last 30 days was $176.99 at Ammunition Depot.
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
- 16.1" · Handguards
Specifications
- Manufacturer
- CMMG
- Color
- Black
- Platform
- AR-15
- Caliber
- 5.56 mm NATO
- Gas system
- Carbine
- Barrel length
- 16.1"
- Thread pattern
- ½ x 28
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 5.56mm 16.1" Barrel Length M4 and Lightweight Tapers Carbine Gas System Length A 1/2-28 Threads 1-7 Barrel Twist Salt Bath Nitride Finish Mfg: Cmmg
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