The Bureau of Alcohol, Tobacco, Firearms, Explosives and really big fires can’t seem to get it’s brace screwed on straight.
Earlier in 2014, it issued at least two compliance letters (903050, 99146) indicating that use of the Sig Support Brace in any configuration is completely and perfectly legal because “using the brace improperly does not constitute a design change. Using such an accessory improperly would not change the classification of the weapon per Federal law.”
Now, on November 10th, there’s a new letter from ATF saying that use of the accessory in a manner previously ruled lawful is suddenly unlawful.
Frankly, it’s time to eliminate the entire “short-barreled rifle” section of the National Firearms Act.