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Magpul 223 AICS PMAG

2.39 COAL...…….….I'll measure and report what the max COAL is with the MDTs I have when I get home tonight.
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You can usually take a chainsaw file and open them up a bit without effecting the integrity of the magazines as well.

Obviously we'll have to wait and see them in person before we know if that's an option, but it has been with everything else out there.
 
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