One rumor is that LOP is the issue. Apparently instead of measuring horizontally, they measured diagonally to the trigger, which made LOP over 13.5" rather than 13.35"? 
I should also point out that the proprietor (Keving Brittingham) was at Sig when they sued ATF on their "muzzle brake" and Sig lost. This may well affect other brace makers if ATF pursues this line of absurdity, but tweaking KB's nose first can't be a coincidence.
I'll try to remember and measure it on my brace tonight.
This could be a real shyt show quickfast and inahurry.
My big question is if it's actually a brace and not a stock, why is LOP important at all? 
One rumor is that LOP is the issue. Apparently instead of measuring horizontally, they measured diagonally to the trigger, which made LOP over 13.5" rather than 13.35"?
If this is the case they could be “killing two birds with one stone”. The LAW folder is mighty handy with a brace too. Somebody somehow needs to get this into a courtroom or Congress needs to put it to bed once and for all. It’s getting ridiculous with all the back and forth ATF interpretations.
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My big question is if it's actually a brace and not a stock, why is LOP important at all?
Because some gangbanger might get a hankerin to spend $2000+, fill out a 4473, and somehow stick one of these down his drawers and go shoot up a school?
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