This video demonstrates that both standard and windowed Magpul PMAG 30 Gen M3 magazines can hold an extra round, for a total of 31 rounds. The speaker successfully loads 31 rounds of 5.56 ammunition into a non-windowed PMAG using a Uniloder speed loader, confirming the 'hidden trick' applies across different PMAG 30 variants. The test concludes that 32 rounds cannot be accommodated.
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