According to the evidence list for the upcoming trail, the equipment that brought about the alleged infraction included a Maxim CQB Pistol AR 15 PDW brace, Stark Express angled foregrip, and a flash suppressor that added about two inches to the 7.75-inch barrel. These items were all previously approved by the Firearms and Ammunition Technology Division, the arm of the ATF charged with responding to technical inquiries and testing and classifying products submitted to them for review, as well as providing technical services to the firearms industry and other members of the public.