Might I suggest updating your avatar.
We lost.
On the contrary, we haven't lost. The Sig brace is either a stock or it isn't. Imaginary "redesign" will not hold up in courts. Otherwise if I shoot my rifle without the stock touching my shoulder I have just created a AOW. If I shoot a pistol with two hands I have created a AOW. If I shoot a Sig arm brace as intended with a second hand on the gun I have created an AOW. The ATF cannot pick and choose how to apply the law based on the convenience as to how it fits their agenda, that is called arbitrary and capriciousa and won't hold up in court. Their only legal recourse is to classify the brace as a stock, anything else would require a new law to be passed.