There are millions of morons out there who would believe your post and act on it. No judge or prosecutor is going to treat a banned magazine as legal because one changed the label anymore than they would treat a Thompson submachine gun as a musical instrument if it is put in a violin case.

There are morons out there but it does have a point. You can only put 9 .458 rounds in it... But the other side is you can also put 12 9mm rounds in a 10 round .40 magazine. Does it make it a high capacity magazine?
So if you have a 458 upper and these magazines, would they be high capacity or 10 round maximum? And yes I know if you put any other type of round into it, it would then be a different capacity.
Different calibers that will fit in standard AR magazine and feed.
Double Stack:
.17 Fireball
.17 Remington
.19 Calhoun
.223 Remington
.20 Tactical
.204 Ruger
.25-223
.300-221 Fireball
.300 AAC Blackout
.375 Reaper
5.56 NATO
7mm Whisper
7.62 X 40mm
6 X 45mm
6.5 X 45mm
.257X45mm
Single Stack:
.440 Corbon (Requires mag spacer)
.458 SOCOM
.458 RMW
.50 AE (Requires mag spacer)
.50 GI (Requires mag spacer)
.50 Beowulf (Requires mag spacer)
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