16" .400 Legend AR-15 Rifle Barrel – 1:16 Twist

Barrels

AR-15 .400 Legend 16" Barrel | 1:16 Twist | Carbine Gas

Configure a .400 Legend AR-15 rifle around this 16" .400 Legend barrel, manufactured from durable 4150 CrMoV steel and finished in black nitride.

The 16" medium-profile barrel features a 1:16 twist rate, carbine-length gas system, .750" gas block journal, and 5/8x24 (.40 cal) muzzle threads. The combination makes this a versatile rifle-length barrel option for .400 Legend AR-15 configurations, including hunting-oriented setups.

Barrel Specifications

• Caliber / Chamber: .400 Legend
• Barrel Length: 16"
• Profile: Medium
• Twist Rate: 1:16
• Gas System: Carbine Length
• Gas Block Journal: .750"
• Material: 4150 CrMoV
• Muzzle Thread: 5/8x24 (.40 Cal)
• Finish: Black Nitride

Key Features

16" Rifle-Length Configuration — A practical barrel length for shooters looking for a balance between overall rifle size and .400 Legend performance.

1:16 Twist Rate — Manufactured with a 1:16 rifling twist specification for the .400 Legend chambering.

Medium Profile — Provides a substantial rifle-barrel configuration without moving to an unnecessarily heavy profile.

Carbine-Length Gas System — This barrel is manufactured for a carbine-length gas system and uses a standard .750" gas block journal.

4150 CrMoV Construction — Manufactured from Chrome Moly Vanadium steel for durability in an AR-platform barrel.

Black Nitride Finish — Provides a durable, corrosion-resistant surface finish.

5/8x24 (.40 Cal) Muzzle Threads — Threaded for compatible .40-caliber muzzle devices. Verify the device's caliber rating and thread specification before use.

Why is a 16-inch barrel popular for .400 Legend?

A 16-inch barrel is a popular .400 Legend choice because it offers a practical balance of ballistic performance, overall rifle length, and maneuverability. For hunting-oriented AR-15 configurations, 16" also provides a relatively compact rifle compared with longer barrel options. This barrel combines its 16" length with a 1:16 twist, medium profile, carbine-length gas system, and 5/8x24 muzzle threads. Actual velocity and performance will vary depending on the ammunition used.

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