he other company is General Dynamics, which is basically unknown on the American commercial gun market, but has a long and storied history as a defense contractor and provides a substantial percentage of U.S. military ammo as I understand it. The article (which I'll search out later) made the point that GD's participation is a major coup for S&W because it offsets their perceived lack of experience with modern U.S. military contract work.
GD is well known to folks who reload as the folks behind the powder plant in St. Marks FL. And now that you mentioned it, it WAS GD, not Remington I read about.