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Why isn’t it compatible with the Gen 3 PMag? — 2 Answers

by Ian, from NY, United States Asked on December 21, 2021

Name FAB Defense Magazine Well Grip for M16/M4/AR15 (4)
$25.50 $23.50 Save $2.00
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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.

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A
Answered by MaineAR, guest, from ME, United States, on January 28, 2022

From experience, the gen 3 PMAG has a nub in the rear where it would almost meet the magwell of an AR receiver. It’s meant to prevent over insertion. The problem is that the FAB Defense has a lip in the same location on the inside of its magwell. The magazine nub bumps into the magwell grip and cannot be fully inserted. It is actually not because of the texture as others have indicated.

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Last updated 2025-11-12 UTC.