Arm Or Ally .308 Win 18" Heavy Profile Barrel

Arm Or Ally .308 Win 18″ Heavy Profile Barrel

The Arm Or Ally .308 Win 18″ Heavy Profile Barrel is engineered for precision, strength, and long-range performance. Manufactured by a leading U.S. barrel maker, this barrel is machined from 4150 Chrome Moly Vanadium (CMV) steel and finished in a deep black QPQ Nitride coating for superior corrosion resistance and long-lasting durability.

This heavy profile barrel includes M4 feed ramps for reliable cycling and a reinforced M4 barrel extension. Both the extension and barrel are finished separately before final torque assembly, ensuring proper alignment and optimal performance. With a rifle-length gas system and a .750 gas block journal, this configuration is ideal for maximizing accuracy and recoil control in full-size AR-10 and LR-308 platforms.

The 18″ length hits the sweet spot for shooters who demand improved velocity, flatter trajectories, and enhanced accuracy without stepping into the added weight of a 20″ build. Whether you’re shooting for precision, hunting, or general long-range application, this barrel delivers uncompromising results.

Features:

• Caliber: .308 Winchester
• Length: 18″
• Profile: Heavy
• Gas System: Rifle-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 (ideal for stabilizing heavier projectiles)
• Threaded Muzzle: 5/8×24 for standard muzzle devices or suppressors
• Made in the USA

If you’re planning a precision-driven or hard-use AR-10 build, the Arm Or Ally .308 Win 18″ Heavy Profile Barrel is the high-value option you can trust.

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