https://www.youtube.com/results?sear...+Receiver+Rule
The Biden BATFE has again overreached in re-defining what is a firearm without involving Congrerss. The judge in this case (see video) made a summary judgement against the government, ruled against them and threw out the case.
There are many videos explaining this case. This one seemed to be pretty explicit and concise without much posturing or Billy-Bob BS.
TYhere will likely be implications regarding "Gjost Guns", Pistol Braces, re-set triggers and maybe Bump-Stocks.