Daniel Defense 16″ 5.56MM, CARBINE, 1:7, M4

Product Description

The Daniel Defense 16″ 5.56MM carbine barrel is a cold hammer forged replacement barrel designed for AR-15 and M16 upper assemblies. It ships as a standalone barrel component for builders and gunsmiths working on custom or replacement uppers.

This barrel uses a carbine-length gas system and a 1:7 twist rate, making it compatible with a wide range of 5.56 NATO and .223 Remington ammunition. The M4 profile balances durability and weight for general-purpose carbine use.

Key Facts

• Barrel Length: 16 inches
• Caliber: 5.56 NATO
• Twist Rate: 1:7
• Material: Chrome Moly Vanadium Steel, cold hammer forged
• Bore Finish: Chrome lined
• Gas System: Carbine length, .750″ gas port diameter
• Threads: 1/2×28 TPI muzzle threads
• Extension: A4 barrel extension

What the 1:7 Twist Rate Means

A 1:7 twist stabilizes heavier projectiles, typically 62 grains and up. If you shoot M855, 77-grain match loads, or other long-for-caliber bullets, the faster twist keeps them stable through the supersonic flight envelope. Lighter 55-grain loads still perform well in a 1:7 barrel, so this twist rate handles the full practical range of 5.56 ammunition.

Carbine Gas and M4 Profile

The carbine-length gas system pairs with the 16-inch barrel length for reliable cycling with standard buffer weights and springs. The M4 profile tapers from a .750″ diameter at the gas block journal to a narrower contour toward the muzzle, a familiar weight distribution for shooters upgrading from mil-spec carbines.

The chrome-lined bore resists throat erosion and cleans up more easily after high round counts. The heavy phosphate exterior finish is a standard military specification coating that resists corrosion and wear.

Chrome Moly Vanadium and Cold Hammer Forging

Cold hammer forging compresses the steel around a mandrel, producing a dense grain structure and consistent bore dimensions. Chrome moly vanadium steel is widely used in AR barrels for its combination of strength and machinability. The process leaves the bore smooth and the rifling sharp, which contributes to accuracy and barrel life.

Buying from Western Sport in Roanoke, TX

Western Sport is a licensed FFL/SOT dealer serving the North Texas and DFW area since 2007. Lance Rankin and the gunsmithing team can answer technical questions about barrel installation, headspacing, and compatibility with your upper receiver. Call 817-393-4000 to order or confirm specifications.

Frequently Asked Questions

Q: Will this Daniel Defense barrel fit my AR-15 upper receiver?

A: This barrel fits standard AR-15 and M16 upper receivers that accept A4 barrel extensions. The .750″ gas block journal is the standard diameter for carbine-length gas systems. Call 817-393-4000 if you need to verify compatibility with a specific upper or gas block.

Q: What is the difference between carbine-length and mid-length gas systems?

A: Carbine-length gas systems have the gas port closer to the chamber, which generates higher pressure at the gas block and sharper recoil impulse. Mid-length systems spread the impulse over a longer dwell time, reducing felt recoil and bolt carrier velocity. This barrel uses carbine-length gas, the most common configuration for 16-inch barrels.

Q: Can I install this barrel myself or do I need a gunsmith?

A: Installing an AR barrel requires a barrel nut wrench, upper receiver vise block, and torque wrench, plus the ability to check headspace with go/no-go gauges. If you do not have the tools or experience, Western Sport offers gunsmithing services in Roanoke. Call 817-393-4000 to discuss installation.

Q: What muzzle devices will thread onto this barrel?

A: Any muzzle device with 1/2×28 threads will fit this barrel. That thread pitch is the standard for .223 and 5.56 muzzle brakes, flash hiders, and compensators. Check that your muzzle device is rated for 5.56 NATO chamber pressure.

Q: Is the chrome lining on the inside of the barrel or the outside?

A: The chrome lining is inside the bore and chamber. The outside finish is military specification heavy phosphate coating. Chrome lining the bore reduces throat erosion and makes carbon fouling easier to remove during cleaning.

Q: Does Daniel Defense cover this barrel under warranty?

A: Warranty terms should be confirmed directly with Daniel Defense or by calling Western Sport at 817-393-4000 before purchase. We can help you reach the manufacturer if you have questions about coverage or registration.

Additional information