The 5th circuit has put down the federal bump stock ban as a violation of the government administrative procedural act. This could also be great news against the upcoming pistol brace rule.
https://assets.nationbuilder.com/fi...3045236/Cargill_v_Garland_En_Banc_Opinion.pdf
https://assets.nationbuilder.com/fi...3045236/Cargill_v_Garland_En_Banc_Opinion.pdf