The ATF’s new definition of a rifle classifies a firearm that is equipped with an accessory, component, or other rearward attachment such as a stabilizing brace and provides a surface area that allows the weapon to be fired from the shoulder, along with other factors that indicate that the ...
the ATF responded with an approval letter stating that “the submitted brace, when attached to a firearm, does not convert that weapon to be fired from the shoulder and would not alter the classification of a pistol or other firearm. While a firearm so equipped would still be ...