From Ammoland.com:

The United States District Court for the Southern District of California ruled against Ares Armor in its lawsuit against the Bureau of Alcohol, Tobacco, Firearms and Explosives in a decision filed Thursday. United States District Judge Janis L. Sammartino, a George W. Bush appointee, ordered dismissal of plaintiff claims.

Ares claimed First, Second and Fifth Amendment violations by ATF, as well as a violation of the Firearm Owners Protection Act.  ATF argued for dismissal, citing “lack of subject matter jurisdiction …  [and] failure to state a claim,” as well as for summary judgment on the claim by Ares that classifying the part as a firearm was “arbitrary.”