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Q&A for Precision Armament EFAB Hybrid Muzzle Brake — 21 Questions & 19 Answers

Name Precision Armament EFAB Hybrid Muzzle Brake (4.9)
As Low As $151.95 Save Up to $8.50
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Q
G Rivera, member, from MT, United States, asked on May 09, 2021

Will this work with 300 blackout barrel? I imagine so, what with the cartridge being dangerously similar to 223/556 caliber...

Expert Answer
A
Answered by Brandon B, Gear Expert, from IL, United States, on July 28, 2021

Yes this item will be compatible

5 of 19 found the following answer helpful.
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Q
Joeshrek, guest, from MA, United States, asked on January 10, 2025

Would this be recommended for a iwi tavor 7 in 308.

A
Answered by Mike, guest, from NY, United States, on June 18, 2025

Yes the .308 caliber version of the EFAB would be a phenomenal brake on the IWI Tavor 7 in .308 Winchester.

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Q
cz3, member, from NC, United States, asked on November 26, 2024

Is this compatable with 9mm cz scorpion & SP5k/MP5k ?

A
Answered by Mike, guest, from NY, United States, on June 18, 2025

No, the only options for this brake are in 22 caliber and 30 caliber. The 9mm cartridge is a 35 caliber and would result in a baffle strike.

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Q
LMNO, member, from TX, United States, asked on September 29, 2024

Does the EFAB work on a 10.5" barrel? (I've read that the AFAB works on 14.5" but NOT 10.5", hence my query)

A
Answered by Mike, guest, from NY, United States, on June 18, 2025

Yes, the EFAB was made with barrels shorter than 14.5" in mind. Its an extremely comfortable brake to shoot and is great on AR Pistols and SBRs.

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Q
Brian, member, from FL, United States, asked on March 25, 2024

Should I use any thread loc on my EFAB?

A
Answered by Mike, guest, from NY, United States, on June 18, 2025

The use of thread-lock is entirely up to the individual. Precision Armament recommends tightening down the brake 20-30 ft-lbs and that should be fine. If using a thread-lock such as Rockset, make sure you give it time to season/dry. This can take 3-5 days but can be quicker if you use a heat gun.

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Q
Maker, member, from OH, United States, asked on October 14, 2022

Would this work with the AR57 upper?

Expert Answer
A
Answered by Ethan, Gear Expert, from IL, United States, on October 17, 2022

Yes, the Precision Armament EFAB Hybrid Muzzle Brake will be compatible with 5.7x28mm. You would need the 1/2x28 model, MPN:A04484.

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Q
Dan, guest, from IL, United States, asked on October 07, 2022

Will this help on a 7.5 barrel 556 pistol? I have one for a 16 inch 556 and its excellent.

Expert Answer
A
Answered by Hunter, Gear Expert, from OH, United States, on October 13, 2022

The Precision Armament EFAB Hybrid Muzzle Brake can be used on a 7.5" AR Pistol in 5.56. It will help mitigate recoil on any barrel length.

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Q
Stvsalera, member, from MI, United States, asked on June 13, 2022

will this work on a wasr 10? also do you have to use red loctite with this?

Manufacturer Answer
A
Answered by Precision Armament, Manufacturer from NY, United States, on June 29, 2022

Thank you for reaching out. The standard thread for WASRs is 14x1 LH, which the EFAB is not offered in. We do have our M4-72 Severe Duty Compensator offered in an AK variation with those threads.

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Q
The Appalachian American, guest, from IL, United States, asked on April 03, 2022

Outside diameter?

Expert Answer
A
Answered by Hunter, Gear Expert, from OH, United States, on April 12, 2022

The Precision Armament EFAB Hybrid Muzzle Brake diameter at the barrel is .90". However, the manufacturer doesn't specify the diameter at its widest point. I recommend contacting the manufacturer for that information.

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Q
G-Riel, member, from IN, United States, asked on September 11, 2021

will this fit an IWI Galil Ace Rifle in 7.62x39 ?

Expert Answer
A
Answered by Tom B, Gear Expert, from IL, United States, on October 05, 2021

The Galil should have a 5/8x24 thread pitch, so you would want: 35X-BMB-EFABHB-A04488

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