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Q&A for JMac Customs 4C-12 4-Port Muzzle Brake for Mobil Choke Shotguns — 7 Questions & 4 Answers

Name JMac Customs 4C-12 4-Port Muzzle Brake for Mobil Choke Shotguns (1)
$229.95 $206.96 Save 10%
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Q
Rico, guest, from WA, United States, asked on May 13, 2022

Why do you not sell the SHIMS for this...or include them with the item if required?

Expert Answer
A
Answered by Ethan, Gear Expert, from IL, United States, on March 30, 2023

As per the manufacturer: The JMac Customs 4C-12 4-Port Muzzle Brake will include shims as they are required for proper timing.

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Q
Kevin, member, from LA, United States, asked on November 24, 2022

Can this fit on a rock island armory vrf14

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A
Answered by Hunter, Gear Expert, from OH, United States, on November 30, 2022

The JMac Customs 4C-12 4-Port Muzzle Brake for Mobil Choke Shotguns will not work with the RIA VRF14.

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Q
Phil, member, from ID, United States, asked on November 12, 2022

Just received the JMac 4C-12 4 Port muzzle brake. It comes with shims. Do I have to remove the factory choke on IWI Tavor TS12 before I thread it on?

Expert Answer
A
Answered by Hunter, Gear Expert, from OH, United States, on November 16, 2022

The factory choke will be removed in order to install the JMac Customs 4C-12 4-Port Muzzle Brake for Mobil Choke Shotguns. Please email us at techsales@opticsplanet.com for more information.

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Q
Blake, guest, from IN, United States, asked on January 30, 2026

Will this fit a citadel boss 25?

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Q
Michaek, guest, from FL, United States, asked on August 21, 2025

Can you use slugs with this brake on a tavor ts12

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Q
Lock, guest, from IL, United States, asked on July 05, 2024

Are there different choke restrictions available or is there just one available

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Q
Montana, guest, from MT, United States, asked on June 29, 2024

Will this work on the hatsan escort sdx12

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Having an account with OpticsPlanet.com makes writing questions and answers even better! We’ll save all of your questions and answers in your account, provide you easy access to them, so you can see how the community has responded.

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Last updated 2025-11-12 UTC.