The engineered metal manufacturing business ATW Companies yesterday said it has acquired the gun magazine manufacturing firm Metalform Company, allowing it to expand its portfolio of defense business.

Terms of the deal were not disclosed.

“The acquisition of Metalform will enable us to expand our offering as a leading provider of engineered solutions in metal products for defense applications,” Peter Frost, president of ATW Companies, said in a statement. “The technologies that will evolve out of ATW’s metal manufacturing expertise and Metalform’s defense market presence will take the combined companies to a new level of product offering and market penetration.”

ATW said that Metalform’s deep-drawing, stamping and pistol magazine fabrication capabilities support its vertical integration into the growing firearms and defense industries. Metalform’s top products include 38 caliber, 45 caliber and 9mm magazines it sells to firearms companies.