Q&A for Criterion Barrels AR-15 HBAR Rifle Gas System Barrel

Criterion Barrels AR-15 HBAR Rifle Gas System Barrel

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Chris, guest, from MI, United States, asked on March 10, 2020

Is this barrel made from 4150 steel and dimpled opposite the gas port?

Answered by Brandon, member, from UT, United States, on January 20, 2021

This barrel is made of 4150 CrMoV steel, featuring a chrome-lined bore with honed and hand-lapped rifling. The barrel has a 0.750” gas block that is dimpled for ease of installation and solid lock-up.

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Drew, member, from UT, United States, asked on May 01, 2026

Is this barrel “cold hammer forged?”

Answered by Drew, member, from UT, United States, on May 06, 2026

It looks like I’m answering my own question after doing some quick research into the barrel.
No, this is not “cold hammer forged.” This barrel is designed for rigidity and accuracy instead of high capacity use.
CHF barrels are for 15k rounds fired through them but, are not as accurate as “button-rifled” barrels like this HBAR.

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Rocket, guest, from AZ, United States, asked on July 05, 2022

What is the twist for this barrel?

Expert Answer

Answered by Hunter, Gear Expert, from OH, United States, on July 20, 2022

The Criterion Barrels AR-15 HBAR Rifle Gas System Barrels have a 1:8 twist.

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Tyler, member, from MD, United States, asked on July 04, 2022

Does this have the "HBAR" engraving to be Maryland compliant?

Expert Answer

Answered by Hunter, Gear Expert, from OH, United States, on September 26, 2022

The manufacturer does not state if the Criterion Barrels AR-15 HBAR Rifle Gas System Barrels have HBAR Engraved on the side of the barrel. I recommend contacting the manufacturer in regards to that question.

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Branden, member, from TN, United States, asked on September 09, 2020

Will this work for a functional bayonet build using a virgin pinned front sight assembly?

Answered by Brandon, member, from UT, United States, on January 20, 2021

You would need at least the 20 inch barrel for this to be functional with the rifle length gas tube.

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bhd1994, member, from VA, United States, asked on March 07, 2020

What gas block do you need for this barrel?

Answered by Brandon, member, from UT, United States, on January 20, 2021

This barrel requires a 0.750" Gas Block.

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J, member, from TX, United States, asked on December 14, 2025

Can this barrel accept the ops 12 mount for an AEM5 or OCM5?

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Q&A for Criterion Barrels AR-15 HBAR Rifle Gas System Barrel — 7 Questions & 7 Answers

Is this barrel made from 4150 steel and dimpled opposite the gas port?

Is this barrel “cold hammer forged?”

What is the twist for this barrel?

Does this have the "HBAR" engraving to be Maryland compliant?

Will this work for a functional bayonet build using a virgin pinned front sight assembly?

What gas block do you need for this barrel?

Can this barrel accept the ops 12 mount for an AEM5 or OCM5?