Image unavailable
Classic 5.56x45 Nato Barrel W/Crane Spec (.070'''') Gas Port A(R)ar-15 - 5.56 Nato 10.3'''' 1-7 Gov. Carbine Bbl Threaded Cms Crane-Spec
Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.
$161.50
View on Brownells
You'll be taken to Brownells to complete your purchase.
Hunter's Outpost earns a commission from affiliate links at no extra cost to you.
SKU: 430108655
Overview
Built for a 5.56 chambered AR-15 setup, this 10.3-inch Government Profile barrel is suited to compact carbine builds where a shorter barrel is desired. It features a carbine-length gas system, 1:7 twist rate, and a .750-inch gas block journal, with 1/2x28 threading at the muzzle. The chrome lined bore and chamber, manganese phosphate finish, and phosphate coated M4 feed ramp extension round out the specification set. For builders working around Crane Spec requirements, it offers a clearly defined configuration without extra embellishment.
Why Hunters Choose the Ballistic Advantage
10.3-inch Government
Profile suits compact 5.56 builds
Chrome Moly
Vanadium construction is clearly specified
Chrome Lined
Bore and chamber are listed
1:7 Twist
Rate is provided for this
Carbine-length Gas
System and .070-inch Crane Spec
Key Features
- 5.56 chambered 10.3-inch Government Profile Classic Series barrel
- Machined from Chrome Moly Vanadium steel with chrome lined bore and chamber
- Manganese phosphate finish with phosphate coated M4 feed ramp extension
- 1:7 twist rate and carbine-length gas system
- 0.750-inch gas block journal and 1/2x28 threaded muzzle
- Crane Spec .070-inch gas port; manufactured by Ballistic Advantage
Best Used For
- Builders seeking a 10.3-inch 5.56 Government profile barrel for an AR-15 carbine setup.
- Users needing a barrel with a .750-inch gas block journal and carbine-length gas system.
- Shooters planning a threaded 1/2x28 muzzle configuration for compatible accessories.
- Those wanting a chrome lined bore and chamber in a compact 5.56 barrel package.
- AR-15 owners specifying Crane Spec .070-inch gas port details for a build.
Specifications
| Barrel Type | Classic Series Barrel |
|---|---|
| Blade Finish | Phosphate |
| Caliber | 5.56 NATO |
| Chrome Lined Bore | Yes |
| Chrome Lined Chamber | Yes |
| Country Of Origin | Ballistic Advantage |
| Gas Block Journal | .750" |
| Gas System Length | Carbine |
| Length | 10.3" |
| M4 Feed Ramp Extension | Phosphate coated |
| Material | Chrome Moly Vanadium |
| Muzzle | 1/2x28 Threaded |
| Other Info | Crane Spec .070" Gas Port |
| Part Number | BABL557103MC |
| Profile | Government |
| Twist Rate | 1:7" |
| Weight | 18 oz |
Pros
- 10.3-inch Government profile suits compact 5.56 builds.
- Chrome Moly Vanadium construction is clearly specified.
- Chrome lined bore and chamber are listed in the description.
- 1:7 twist rate is provided for this barrel.
- Carbine-length gas system and .070-inch Crane Spec gas port are specified.
- 1/2x28 threaded muzzle supports common 5.56 muzzle devices.
Considerations & Trade-offs
- The 10.3" length and carbine gas system make this a compact barrel, so it is intended for a shorter setup rather than a full-length rifle configuration.
- Government profile and 18 oz weight may be a consideration for builders looking to keep the front end as light as possible.
- The .750" gas block journal and 1/2x28 threaded muzzle require compatible components, so fitment should be confirmed before ordering.
- Chrome-lined bore and chamber are specified, but the finish is phosphate, so the exterior will still need normal care and maintenance.
Suggested Comparisons
- AR-15 upper receiver assemblies
- 5.56 NATO muzzle devices
- Carbine-length gas system components
- Government-profile barrels
Suggested Accessories
- AR-15 upper receiver components
- Carbine-length gas system parts
- .750" gas block
- 1/2x28 muzzle device
Frequently Asked Questions
What caliber and chambering is this barrel made for?
It is a 5.56 chambered barrel, listed as 5.56x45 NATO.
What are the key dimensions and specs provided for this barrel?
The listed specs are: 10.3" length, Government profile, 1:7" twist rate, carbine gas system length, .750" gas block journal, and 1/2x28 threaded muzzle.
What material and finish does this barrel use?
The barrel is machined from Chrome Moly Vanadium (CrMoV) steel and has a phosphate finish. The bore and chamber are chrome lined, and the M4 feed ramp extension is phosphate coated.
What does "Crane Spec .070" gas port" mean in the product listing?
The product data identifies it as a Crane Spec .070" gas port. No additional explanation is provided in the source data.
Who makes this barrel and what is the part number?
The manufacturer listed is Ballistic Advantage, and the part number is BABL557103MC.