Originally Posted by 219Zipper
Also, is it correct that the magazines of the 5.56/223 will work safely with the 300 rounds?

I recently read that and did want to confirm it as 100% accurate...?


That is correct.

Here's a pic. From left: 223, 300 Blackout first 2 supersonic, one on right 220 Gr subsonic.

[Linked Image]

Last edited by 257heaven; 05/22/13.
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