It is my understanding that a standard USGI mag body holds 11 rounds of 458 scocom.

I also have seen that some places offer USGI-ish looking mags that are allegedly 10 round 458 socom mags.

If they are advertised as 10rd but really hold 11 this could be a serious problem for people behind enemy lines.

Is there a magazine plug or a follower with extended legs to ensure that 458 socom when using a standard USGI body will truly be a 10rd mag and not an 11?

Thanks.

TED