Stag Arms 20" 5.56 1:7 HBAR CMV Barrel Rifle Length w/Pinned FSB (Chrome&Phos)

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The 20" 5.56 NATO barrel has a military A2 HBAR profile. The barrel has a 1/7 twist. The barrel extension is pre-installed and headspaced.


Caliber: 5.56 NATO | .223

Length: 20"

Diameter at the gas port: .750"

Barrel Threading: 1/2x28

Twist Rate: 1/7

Barrel Profile: A2 Heavy Barrel (HBAR)

Barrel Material: 4150 CMV

Barrel Lining: Chrome Lined

Barrel Coating: Manganese phosphate

Gas System: Rifle Length Direct Impingement

SKU: STAG400076


Q: Will this work with my upper receiver?

A: The barrel will work with any mil-spec upper receiver.

Q: Do you provide instructions on how to install the barrel?

A: Unfortunately we don't provide directions on how to install a barrel and recommend that it be installed by a gunsmith to prevent damage to the rifle.

Q: Do I have to purchase a matched bolt to my barrel?

A: With AR-15's as long as you are using the proper bolt for the caliber you do not need to match a bolt to the barrel.



3 Reviews

  • 5
    Very happy with this item

    Posted by Astag Izgud on 1st Jun 2021

    I was very happy to find a barrel for retro builds. The assembly was exactly the quality I expected to receive from Stag. This completed my A2 clone, original hand guards fit perfectly.

  • 5
    4140 steel 20" barrel with ambidextrous barrel extension

    Posted by Kenneth Hill on 15th Jan 2018

    No more right hand - left hand barrels. New ownership fixed that problem. U.S. Veterans are running the show now. My rifle looks so much better and shoots better with this barrel. My Stag Dealer/gunsmith is the greatest too. Stag Arms customer for life. The ambidextrous barrel extensions shows me that this company means business.

  • 5

    Posted by Sean Prinsen on 27th Nov 2017

    Amazing quality