“Effective immediately, any requests for a determination on how an accessory affects the classification of a firearm under the GCA or NFA must include a firearm with the accessory already installed.”
Oh, the unintended consequences.
Create new accessory of unknown classification.
Assemble for use.
Submit for classification.
BATFE classifies as NFA item.
BATFE presses charges for illegal manufacture of prohibited/illegal item.
Case appealed.
SCOTUS overturns NFA or 922(o).
Remember, NFA and 922(o) have no exemptions for “evaluation”. A non-FFL building interesting new things and wanting them categorized are subject to serious prosecution if not ruled “ok”. They decide you made a machinegun, you’re in jail for 10 years.