Daniel Defense 14.5" 5.56 NATO AR-15 Barrel - 4150 CMV Steel, Black Phosphate, Midlength, Lightweight Profile

The Daniel Defense 14.5" 5.56 NATO AR-15 barrel brings cold hammer forging precision to your build, whether you're assembling a carbine for duty, competition, or tactical training. This midlength profile barrel is crafted from 4150 chromium molybdenum vanadium steel with a mil-spec heavy phosphate finish—a time-tested combination for durability and corrosion resistance. Daniel Defense manufactures these barrels in their Georgia facility using cold hammer forging, a process that applies intense hydraulic pressure to create defect-free bores and consistently tight chambers. The result is a barrel that shoots straight and stands up to serious use.

A 1:7" twist rate pairs well with modern 5.56 ammunition across the velocity spectrum, stabilizing everything from lighter varmint loads to heavier defensive rounds. The midlength gas system strikes a balance between reliability and controllability—cleaner impulse than a rifle-length tube, less aggressive than a carbine setup. Your muzzle sits at 1/2×28 TPI threads, ready for a suppressor, flash hider, or brake. The .750" diameter at the gas port and A4 barrel extension are milspec standard, so compatibility with your upper receiver and gas tube is straightforward.

If accuracy and longevity matter more to you than cutting costs, cold hammer forging delivers. The process compresses the steel rather than removing material, which Daniel Defense argues yields superior performance compared to cut or button-rifled alternatives. This is a no-nonsense barrel for builders who expect their AR to run and stay on target.

Key Features

• Cold hammer forged 4150 CMV steel for accuracy and durability
• Mil-spec heavy phosphate finish resists corrosion
• 1:7" twist rate handles a wide range of 5.56 ammunition
• Midlength gas system balances reliability and recoil impulse
• 1/2×28 TPI muzzle threads for suppressors and muzzle devices
• Defect-free bore and consistent chamber from hammer forging process
• Made in the USA at Daniel Defense's Georgia facility

Specifications

Frequently Asked Questions

Will this barrel work with my AR-15 upper receiver?

Yes. The A4 barrel extension and standard milspec dimensions make this barrel compatible with any standard AR-15 upper receiver. You'll need a compatible gas tube for the midlength system and a barrel nut appropriate to your upper.

What ammunition does the 1:7" twist rate stabilize?

The 1:7" twist is a versatile rate for 5.56 NATO. It stabilizes lighter rounds (55-grain) and heavier defensive/match ammunition (77-grain and up), making it a good all-purpose choice for hunters, shooters, and operators who run a variety of 5.56 ammo.

Can I mount a suppressor on this barrel?

The barrel features 1/2×28 TPI muzzle threads, the standard for 5.56 suppressors and muzzle devices. Any suppressor or brake with 1/2×28 threading will fit.

What's the advantage of cold hammer forging over other rifling methods?

Cold hammer forging compresses steel rather than removing it, creating a denser, more uniform bore with tighter chamber tolerances. Daniel Defense argues this delivers superior accuracy and barrel life compared to cut or button-rifled alternatives.