My M4

Migztech_V2

New member
Joined
Sep 27, 2025
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2
I'm using a mag extension and pistol grip on my M4. I'm curious if it's legal to keep the original 5rd tube's limiting lock ring while adding a plug for the extension.

Basically, the gun would still only hold 5 rds unless someone removes the mag cap and lock ring. I'm thinking about this mainly for easier upkeep and because I like the look. I've also considered switching to a field stock for a full 7rd tube, but this setup feels good for now. Just want to make sure I'm not breaking any rules once I install the extension.
 

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