AR-15 10 round mag loophole

[givemeliberty]

Can someone please explain to me what the loophole is that allows you to have a 10 round mag for an AR.

 

[-[Crosshair]-]

http://www.canadiangunnutz.com/forum/search.php?search_type=1

 

[Avalonthas]

It is not a loop hole, it is law permitted

 

[Avalonthas]

h ttps://shopquestar.com/shopping65/q_images/LAR%20Pistol%20Mags%20Ruling%202008-06-18.pdf

 

[r106]

Is it magazine loop hole Tuesday already

 

[C77]

I think that bout covers it.