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Q&A for FAB Defense Magazine Well Grip for M16/M4/AR15 — 27 Questions & 31 Answers

Name FAB Defense Magazine Well Grip for M16/M4/AR15 (4)
$25.50 $23.50 Save $2.00
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Q
Ian, member, from NY, United States, asked on December 21, 2021

Why isn’t it compatible with the Gen 3 PMag?

Expert Answer
A
Answered by Ethan, Gear Expert, from IL, United States, on January 11, 2022

Fab Defense states that the texture/material on the Gen 3 PMAG interferes with the MWG making it difficult to insert the magazine.

2 of 4 found the following answer helpful.
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Q
Chasegunman, guest, from AR, United States, asked on January 27, 2020

Will this work on commercial lowers? I see that people are having problems with the fit and are having to Dremel?

Expert Answer
A
Answered by Armando R., Gear Expert, from IL, United States, on February 27, 2020

These magazine well grips are meant specifically for mil-spec lower receivers that are standard forged lowers. It is not guaranteed to work with billet lowers or lower receivers that differ from a standard mil-spec lower with no flared magazine well.

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Q
matt, guest, from VT, United States, asked on January 06, 2019

Anyone have this on a diamondBack db15 , it seems like my handguard bottom were it meets the reciever sticks down towards my.mag well more than others

A
Answered by Dave, member, from OR, United States, on February 21, 2020

I added one to my Diamondback DB15. Looks and works great.

7 of 9 found the following answer helpful.
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Q
akar, member, from IN, United States, asked on December 24, 2017

does this have a serial number window on the other side?

Expert Answer
A
Answered by Matt S., Gear Expert, from IL, United States, on December 27, 2017

Yes, this has a cutout to be able to view the serial number

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Q
Will, guest, from TX, United States, asked on January 12, 2023

Will this fit a db10 /ar10

Expert Answer
A
Answered by Ethan, Gear Expert, from IL, United States, on January 18, 2023

No, this FAB Defense Magazine Well Grip is only compatible with AR15 pattern rifles.

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Q
Caleb, member, from OH, United States, asked on June 09, 2022

Will this fit on a delton DTI-15 correctly?

Expert Answer
A
Answered by Hunter, Gear Expert, from OH, United States, on June 22, 2022

The FAB Defense Magazine Well Grip for M16/M4/AR15 is designed to fit magwells on Mil-Spec lower receivers. So it should work fine with the DelTon DTI-15.

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Q
Earl Carson, member, from MT, United States, asked on June 02, 2022

Will this work on a M&P-15-22LR And on a Ruger Precision Rifle 22LR?

Expert Answer
A
Answered by Hunter, Gear Expert, from OH, United States, on June 15, 2022

The FAB Defense Magazine Well Grip should fit a M&P15 22LR but it will not fit a Ruger Precision .22LR.

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Q
overzealous, guest, from OK, United States, asked on December 01, 2021

Will this fit a CITADEL BOSS-25?

Expert Answer
A
Answered by Ethan, Gear Expert, from IL, United States, on January 11, 2022

No. The FAB Defense Magazine Well Grip for M16/M4/AR15 will only fit M16 5.56x45 lower receiver variants, without a flared magazine well.

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Q
Drew, guest, from MS, United States, asked on November 25, 2021

Will this fit on a maxim defense pdx 300 blackout?

Expert Answer
A
Answered by Ethan, Gear Expert, from IL, United States, on January 11, 2022

The FAB Defense Magazine Well Grip for M16/M4/AR15 will work with your setup. It fits all M16 5.56x45 lower receiver variants, without a flared magazine well. Including those chambered in 300 Blackout.

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Q
mike, guest, from CO, United States, asked on October 25, 2021

Do they make this for ar10

Expert Answer
A
Answered by Ethan, Gear Expert, from IL, United States, on January 11, 2022

Fab Defense currently does not offer a variant for the AR10/SR25 platform.

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Last updated 2025-11-12 UTC.