Can I shoot 5.56 using 300 BLK PMAGs?

[AregularGuy]

5.56 works fine for me in the 300 blk PMAGs.


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Thanks! Good to know. Maybe I will keep them as an experiment.

[Nephthys]

I believe the main reason magpul had for creating the 300 blk mags was for the mags to clear supersonics, as some factory loads went all the way wall-to-wall in the body and created malfunctions, so they tweaked the body internals

[sigstroker]

Subsonics, you mean.

[HalfFast]

So will 300 blackout work in the 60 round 5.56 p-mag drum I just got? Hmmm. What say you? I see some testing may need to be added to my Saturday schedule.

[sl0re10]

If you have trouble; maybe you can set up a trade for 556. I hear some people might have a couple extra.