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Questions & Answers
what size gas block? Expert Answer

A .750 gas block is compatible with this barrel.

by Coyte I., Gear Expert, July 9, 2018
is the chrome lined? or nitrided? Expert Answer

This barrel is Nitrided.

by Coyte I., Gear Expert, July 9, 2018
Customer Reviews
Helpful Negative Review
My previous AR was a BCA upper, and I swapped the barrel out with a ballistic advantage 18 in, im not marksman, and i dont use a led sled, just bipod and tuck the stock in my shoulder tighly and breathe, but on that i was getting about 2moa with PPU/...
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Color:
Black
Finish:
Nitride
Caliber:
.223 Wylde
Barrel Length:
20 in
Barrel Profile:
HBAR
Gas System Length:
Rifle Length
Gas Block Journal Size-Diameter:
.750 in
Barrel Twist Rate:
1-8
Flutes:
No
Gun Make:
AR Platform
Gun Model:
AR-15
Additional Features:
M4 Barrel Extension
Firearms Threads Per Inch:
1/2x28

Code: 2RR-ATB-RHBARN-1520S-HB12-N

MPN: 1520S-HB12-N

List: $329.99Save 10%
$297.99

Product Info for Criterion Barrels AR-15 HBAR Nitrided Rifle Gas System Barrel

The Criterion Barrels AR-15 HBAR Nitrided Rifle Gas System Barrel is an excellent barrel to upgrade your rifle build with an extended length or 1-8 twist rate. Criterion Barrels crafted these Rifle Barrels with a .223 Wylde chamber that is compatible with both .223 Remington and 5.56 NATO ammunition, and the barrel has honed and hand-lapped rifling for bore uniformity and easier cleaning which also helps with accuracy and precision. This Criterion Barrels AR-15 HBAR Nitrided Rifle Gas System Barrel is equipped with a 0.750in gas block that is compatible with both standard and M4 feedramps, and the 0.750in muzzle threads is compatible with a wide range of muzzle devices and suppressors. Enhance the quality and capabilities of your firearm with this Criterion Barrels AR-15 1/2x28 TPI Rifle Gas System Barrel.image

Specifications for Criterion Barrels AR-15 HBAR Nitrided Rifle Gas System Barrel:

Manufacturer: Criterion Barrels
Color: Black
Finish: Nitride
Fabric/Material: Steel
Caliber: .223 Wylde
Barrel Length: 20 in
Barrel Profile: HBAR
Gas System Length: Rifle Length
Gas Block Journal Size-Diameter: .750 in
Barrel Twist Rate: 1-8
Flutes: No
Gun Make: AR Platform
Gun Model: AR-15
Additional Features: M4 Barrel Extension
Firearms Threads Per Inch: 1/2x28

Features of Criterion Barrels AR-15 HBAR Nitrided Rifle Gas System Barrel

  • .223 Wylde chamber that is designed to safely and effectively fire both .223 Remington and 5.56 NATO ammunition
  • Honed and hand-lapped rifling for bore uniformity and a pristine internal finish; aids in barrel cleaning and paramount for accuracy
  • Finely polished chambers for reliable extraction and feeding
  • Rifle gas system compatible with AR15 gas tube system
  • Gas hole tuned for proper function with and without suppressor
  • 0.750" Gas Block, dimpled for ease of installation and solid lock-up
  • 1/2x28 TPI muzzle threads compatible with a wide range of muzzle devices and suppressors
  • Precision-machined barrel extension with M4 feed ramps

Package Contents:

  • Criterion Barrels AR-15 HBAR Nitrided Rifle Gas System Barrel

Criterion Barrels AR-15 HBAR Nitrided Rifle Gas System Barrel Orderable Models

List of Orderable Models

  • Criterion Barrels 20in AR-15 HBAR Nitrided Rifle Gas System Barrel, Black, 1520S-HB12-N , MPN: 1520S-HB12-N , Code: 2RR-ATB-RHBARN-1520S-HB12-N
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Last updated 2026-07-10 UTC.