Moriarti AR-10 12.5" .308 WIN Barrel – Carbine Length Gas, Medium Profile, No Muzzle Thread

Barrels

AR-10 .308 WIN Barrel | 12.5" Medium Profile | Carbine Length Gas | 1:10 Twist | Black Nitride | No Muzzle Thread – Moriarti Arms

Built for compact AR-10/LR-308 builds, this 12.5" .308 Win barrel delivers reliable performance in a short, maneuverable package. The medium profile balances rigidity with manageable weight, while the carbine-length gas system is tuned for dependable cycling in shorter configurations. A 1:10 twist rate stabilizes common .308 bullet weights from duty-grade 147–150 gr through heavier 168–175 gr match loads. Machined from 4150 CrMoV and finished in black nitride, the bore and exterior are hardened for long service life, corrosion resistance, and easier cleaning. The .750" gas journal accepts standard low-profile gas blocks, and the clean, non-threaded muzzle is ideal for jurisdictions or applications that require a smooth crown without a device installed. Perfect for compact hunting rigs, truck guns, and range carbines where durability and accuracy matter in a small footprint.

Specifications

• Caliber: .308 Winchester

• Barrel length: 12.5 in

• Profile: Medium

• Material: 4150 Chrome Moly Vanadium (4150 CrMoV)

• Twist rate: 1:10 (RH)

• Gas system: Carbine length

• Gas block journal: .750 in

• Muzzle: no muzzle threads (clean crown)

• Finish: Black nitride

• Weight: approx. 30 oz

• Thread pitch: none / not applicable (no muzzle thread)

• Compatibility: AR-10 / LR-308 style platforms (carbine-length gas system)

• Notes: Designed for compact AR-10 carbine builds; verify gas port tuning and use a .750 low-profile gas block. Check local laws for barrel length restrictions.