Arm Or Ally .308 Win 12.5" Government Profile Barrel

Arm Or Ally .308 Win 12.5″ Government Profile Barrel

The Arm Or Ally .308 Win 12.5″ Government Profile Barrel is manufactured by a leading U.S. barrel manufacturer, machined from 4150 Chrome Moly Vanadium (CMV) steel, features M4 feed ramps, and a deep black, classic QPQ Nitride corrosion-resistant finish. M4 extensions and barrels are finished separately before being torqued to their final specifications for maximum reliability and durability.

This .308 barrel is designed with a Carbine-length gas system, which is ideal for short-barreled rifle (SBR) configurations or pistol builds. With a .750 gas block journal, it provides versatile compatibility with most commonly available gas blocks. Whether you’re setting up a compact precision platform or a rugged duty-style rifle, this barrel delivers exceptional value and performance.

The 12.5″ length offers an ideal balance between compact form factor and ballistic performance in the .308 Winchester caliber. It’s engineered to maintain consistent accuracy, proper cycling, and improved heat management under sustained fire.

Features:

• Caliber: .308 Winchester
• Length: 12.5″
• Profile: Government
• Gas System: Carbine-length
• Gas Block Journal: .750
• Material: 4150 Chrome Moly Vanadium (CMV)
• Finish: QPQ Nitride (inside and out)
• Feed Ramps: M4
• Barrel Extension: M4, torqued after nitride
• Twist Rate: 1:10 (optimized for stability across a wide range of bullet weights)
• Threaded Muzzle: 5/8×24 for standard muzzle devices or suppressor adapters
• Made in the USA

This barrel is an excellent option for those building a high-performance AR-10 or LR-308 style rifle, especially where space and maneuverability are priorities without sacrificing firepower.

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