Barrel Sub-Assembly 5.56mm - 16.1" Bbl Sub-Assy M4 1-7 1/2-28" Black Nitride
$176.99 at Ammunition Depot · 5 stores
In stock
Best price
$176.99at Ammunition Depot
In stock checked Oct 1, 2026
Where to buy
| Store | Price | Availability | Buy | Add to build |
|---|---|---|---|---|
| Ammunition Depot Best price | $176.99checked Oct 1, 2026 | In stock | Buy at Ammunition Depot | |
| OpticsPlanet | $199.49Salechecked Oct 1, 2026 | In stock | Buy at OpticsPlanet | |
| Brownells | $185.99not checked recently | Check store | Buy at Brownells | |
| Palmetto State Armory | $197.99checked Oct 1, 2026 | Check store | Buy at Palmetto State Armory | |
| CMMG | $199.95checked Oct 1, 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: $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 |
| CMMG | $199.95 | $199.95 | $199.95 |
| OpticsPlanet | $199.49 | $199.49 | $199.49 |
| Palmetto State Armory | $197.99 | $197.99 | $197.99 |
Since Sep 28, 2026.
About this part
The AR15 16" 5.56 Barrel 4140 MT is a 16" 5.56 / .223 barrel from CMMG. It's sold by 5 stores (2 in stock), from $176.99 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
- Barrel length
- 16" · Handguards
Specifications
- Manufacturer
- CMMG
- Platform
- AR-15
- Caliber
- 5.56 mm NATO
- Barrel length
- 16"
From the manufacturer
Excellent Balance Between Strength & Weight Savings
Chambered in 5.56mm NATO, these medium profile barrels feature a 1-7 twist with 1/2"-28 muzzle threads, and accept .750" diameter gas blocks. Barrels are available in either 416 stainless steel or 4140 chrome moly steel with a nitride finish.Select either a 12.5" barrel with a carbine length gas system, 16" barrel mid-length gas system, or an 18" barrel with rifle length gas system.
AR-15, Issue:11, Page:018
Big Book Catalog, Issue:70, Page:017
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