Donaustahl GmbH

Donaustahl GmbH was a pre-War German ammunition manufacturer that made 9mm rounds.

Appearances
The products of Donaustahl GmbH only appear in Fallout: New Vegas.

Behind the scenes
The name means "Danube Steel", a parody of Rheinmetall AG, which means "Rhine Metalworks" in German. Also, its logo bears a striking similarity to the flag and coat of arms of Bavaria.