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Questions & Answers
Does this DD 10.3 barrel have the .070 gas port diameter size? Expert Answer

The 10.3" barrel has a .750 gas block journal.

by Ethan C., Gear Expert, May 23, 2019
What is the gas port diameter on the 11.5" barrel? Expert Answer

Gas block diameter on these barrels is .750.

by Armando R., Gear Expert, March 26, 2020
Customer Reviews
Helpful Positive Review
Daniel Defense 11.5 W/LPG by Marc DeLeeuw, May 15, 2021
When the barre arrived I was very happy to see that the gas block was pinned. I am very happy with the quality of Daniel Defense as well...which isn’t a surprise from what I had heard. If you are looking for an 11.5 barrel this is the way to go.
2/2 found this helpful
Helpful Positive Review
Solid choice by Larperator 6, Verified Owner, May 3, 2024
You can’t go wrong with DD, light weight, reliable and just overall quality. Had my shots zeroed after 4 rounds (a good optic helps with that too but it’s only half the picture). Will probably buy again for a dmr build later.
2/2 found this helpful
Helpful Positive Review
Great Barrel by Ricky, Verified Owner, October 23, 2024
Always fast shipping with OP. Not a fan of the black phosphate coating on the barrel. The barrel is a tack driver. I am unable to measure the gas port size. 10.3 comes with a pinned gas block, to my surprise the barrel was also dimpled if you want ...
Read More...
2/2 found this helpful
Helpful Positive Review
Smooth and Accurate! by micky, Verified Owner, March 1, 2025
Had no issues at with this barrel and was getting 1MOA, even sub 1MOA on some grouping! Great product and worth for the DD reliability!
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Helpful Positive Review
DD 10.3" Barrel by James Mackey, Verified Owner, August 30, 2025
Super well made barrel I would recommend this to anyone!
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Nothing Better! by Txgreek Txgreek, Verified Owner, March 20, 2021
Built my first 12.5” pistol AR, wanted the best of the best barrels as your bcg and barrels are the heart of the ar built. Heard about DD having over gassed barrels, bought this 12.5” barrel with factory installed and pinned low profile gas block. Th...
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Read All 19 Reviews

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Product Info for Daniel Defense Assy 5.56mm NATO Threaded Barrel

Daniel Defense 10.3 in 5.56 barrel is the most accurate and longest lasting barrel attainable for your AR-15 build. Cold Hammer Forged from 4150 Chrome Moly Vanadium steel, this barrel is Mil-spec heavy phosphate coated and chrome lined with carbine length gas system.image

Specifications for Daniel Defense Assy 5.56mm NATO Threaded Barrel:

Manufacturer: Daniel Defense
Color: Chrome
Finish: Heavy Phosphate
Fabric/Material: 4150 Chrome Moly Vanadium
Caliber: 5.56x45mm NATO
Barrel Profile: Government
Gas System Length: Carbine Length
Gas Block Journal Size-Diameter: .750 in
Barrel Twist Rate: 1-7
Barrel Material: 4150 Chrome Moly Vanadium
Gun Make: AR Platform
Gun Model: AR-15
Condition: New
Firearms Threads Per Inch: 1/2x28
Projectile Caliber: .223 Caliber

Package Contents:

  • Daniel Defense Assy 5.56mm NATO Threaded Barrel

Daniel Defense Assy 5.56mm NATO Threaded Barrel Orderable Models

List of Orderable Models

  • Daniel Defense Rifle Barrel Assembly/CMV/CHF/5.56/1-7/GOV/CAR, 11.5in 07-077-16522-018 , MPN: 07-077-16522-018 , UPC: 852548002325 , Code: DDD-ATB-DFV7R-07-077-16522-018
  • Daniel Defense Rifle Barrel Assembly/CMV/CHF/5.56/1-7/GOV/CAR, 12.5in 07-077-17022-018 , MPN: 07-077-17022-018 , UPC: 852548002349 , Code: DDD-ATB-DFV7R-07-077-17022-018
  • Daniel Defense Rifle Barrel Assembly/CMV/CHF/5.56/1-7/GOV/CAR W/LPG, 12.5in 07-077-07208 , MPN: 07-077-07208 , UPC: 815604011860 , Code: DDD-ATB-DFV7R-07-077-07208
  • Daniel Defense Assy Threaded Barrel, 5.56mm NATO, 10.3 in, Government, Carbine Length, 1-7 Twist, Mil-Spec Heavy Phosphate, 07-077-06128 , MPN: 07-077-06128 , UPC: 815604011839 , Code: DDD-ATB-DFV7R-07-077-06128
  • Daniel Defense Rifle Barrel Assembly, 10.3in, 5.56x45mm NATO, Carbine Length, Black Phosphate 07-077-16176-018 , MPN: 07-077-16176-018 , UPC: 852548002301 , Code: DDD-ATB-DFV7R-070771617601
  • Daniel Defense Rifle Barrel Assembly/CMV/CHF/5.56/1-7/GOV/CAR W/FSB, 12.5in 07-077-10135 , MPN: 07-077-10135 , UPC: 852548002356 , Code: DDD-ATB-DFV7R-07-077-10135
  • Daniel Defense Rifle Barrel Assembly/CMV/CHF/5.56/1-7/GOV/CAR W/LPG, 11.5in 07-077-07108 , MPN: 07-077-07108 , UPC: 815604011846 , Code: DDD-ATB-DFV7R-07-077-07108
  • Daniel Defense Rifle Barrel Assembly/CMV/CHF/5.56/1-7/GOV/CAR W/FSB, 10.3in 07-077-02123 , MPN: 07-077-02123 , UPC: 852548002318 , Code: DDD-ATB-DFV7R-07-077-02123

Daniel Defense Assy 5.56mm NATO Threaded Barrel Unavailable & Discontinued Models

List of Unorderable Models

  • USED, Daniel Defense Rifle Barrel Assembly, 10.3in, 5.56x45mm NATO, Carbine Length, Black Phosphate 07-077-16176-018 , MPN: 07-077-16176-018-EDEMO , Code: DDD-ATB-DFV7R-070771617601-EDEMO-IN-D
  • USED Daniel Defense Rifle Barrel Assembly/CMV/CHF/5.56/1-7/GOV/CAR, 12.5in 07-077-17022-018, EDEMO1, Used, Condition Like New , MPN: 07-077-17022-018-EDEMO1 , Code: DDD-ATB-DFV7R-07-077-17022-018-EDEMO1
  • USED Daniel Defense Rifle Barrel Assembly, 10.3in, 5.56x45mm NATO, Carbine Length, Black Phosphate 07-077-16176-018, EDEMO2, Used, Condition Like New , MPN: 07-077-16176-018-EDEMO2 , Code: DDD-ATB-DFV7R-070771617601-EDEMO2
  • USED, Daniel Defense Rifle Barrel Assembly/CMV/CHF/5.56/1-7/GOV/CAR, 12.5in 07-077-17022-018 , MPN: 07-077-17022-018-EDEMO , Code: DDD-ATB-DFV7R-07-077-17022-018-EDEMO-RE-B
  • USED, Daniel Defense Rifle Barrel Assembly/CMV/CHF/5.56/1-7/GOV/CAR W/LPG, 12.5in 07-077-07208 , MPN: 07-077-07208-EDEMO , Code: DDD-ATB-DFV7R-07-077-07208-EDEMO-RE-C
  • USED, Daniel Defense Assy Threaded Barrel, 5.56mm NATO, 10.3 in, Government, Carbine Length, 1-7 Twist, Mil-Spec Heavy Phosphate, 07-077-06128 , MPN: 07-077-06128-EDEMO , Code: DDD-ATB-DFV7R-07-077-06128-EDEMO-IN-C
  • USED Daniel Defense Rifle Barrel Assembly/CMV/CHF/5.56/1-7/GOV/CAR W/LPG, 11.5in 07-077-07108, EDEMO2, Used, Condition Fair , MPN: 07-077-07108-EDEMO2 , Code: DDD-ATB-DFV7R-07-077-07108-EDEMO2
  • USED Daniel Defense Rifle Barrel Assembly/CMV/CHF/5.56/1-7/GOV/CAR W/LPG, 11.5in 07-077-07108, EDEMO1, Condition Fair, Used , MPN: 07-077-07108-EDEMO1 , Code: DDD-ATB-DFV7R-07-077-07108-EDEMO-US-D
  • DEMO, Daniel Defense Rifle Barrel Assembly/CMV/CHF/5.56/1-7/GOV/CAR W/LPG, 11.5in 07-077-07108 , MPN: 07-077-07108-DEMO , Code: DDD-ATB-DFV7R-07-077-07108-DEMO
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Last updated 2026-06-28 UTC.