| The ideal balance of dwell time and compact length for defensive carbines. Proudly Made in the USA. |
AR15 11.5" 5.56 NATO Carbine-Length Government Profile Barrel
This 11.5-inch government profile barrel is chambered in 5.56 NATO and runs a carbine-length gas system, balancing dwell time with a compact footprint for shorter AR-15 builds. The 1:7 twist rate is designed to stabilize heavier projectiles, while the 1/2x28 muzzle threads accept common muzzle devices made for that thread spec. Proudly made in the USA.
Builders should confirm carbine-length gas block and gas tube fitment, plus handguard length and inner diameter clearance, before assembly. A matching carbine-length gas tube and an AR15 carbine buffer help complete a reliable short-barrel configuration.
Comparing lengths? Step down to the 10.5-inch carbine barrel or browse the full Barrels selection. Verify your intended overall configuration and any applicable regulations before purchasing.
Specifications
| Caliber | 5.56 NATO |
| Barrel Length | 11.5" |
| Gas System | Carbine Length |
| Twist Rate | 1:7 RH |
| Profile | Government |
| Gas Block Journal | .750" |
| Gas Port Size | .073" |
| Muzzle Thread | 1/2x28 |
| Material | 4150 CMV |
| Finish | Black Nitride |
| Barrel Extension | M4 |
| Crown | 11° Target Crown |
| Weight | 21.6 ounces |
| Origin | Made in the USA |
Frequently Asked Questions
It's chambered in 5.56 NATO with a carbine-length gas system, 1:7 RH twist, and government profile. The barrel is 4150 CMV steel with a black nitride finish, a .750" gas block journal, .073" gas port, M4 barrel extension, 11° target crown, and 1/2x28 muzzle threads. Listed weight is 21.6 ounces. Made in the USA.
This barrel runs a carbine-length gas system, so you'll want a matching carbine-length gas tube and gas block. We offer a compatible carbine-length gas tube. Confirm your gas block fits the .750" journal before assembly.
Yes. The muzzle is threaded 1/2x28, which accepts common muzzle devices made for that thread spec. Verify your specific muzzle device is cut for 1/2x28 before installing, and check that it clears your handguard configuration.
For a carbine-length configuration, pair it with a carbine buffer setup. We carry an AR15 carbine buffer and an AR15 carbine buffer tube to help complete the build. Confirm your overall configuration before purchasing.
Yes. If you want something shorter, see the 10.5-inch carbine barrel, or browse the full Barrels selection for mid-length options. Orders ship in 2-3 business days.
Specifications
| Caliber | 5.56 |
| Barrel Length | 11.5" |
| Twist Rate | 1:7 |
| Thread Pattern | 1/2x28 |