The ATF’s Firearms Technology Industry Services Branch just sent out the following notification via email:
Effective Immediately:
The Firearms Technology Industry Services Branch (FTISB) classifies firearms as defined by the Gun Control Act (GCA) and National Firearms Act (NFA) based on the configuration and the design features of the firearm as submitted by members of the industry.
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.