WASHINGTON--(BUSINESS WIRE)--Arlington Capital Partners, a Washington, D.C.-area private investment firm specializing in government regulated industries, today announced it has agreed to sell Stellant Systems, Inc ("Stellant†or "the Company†), a premier designer and manufacturer of radio frequency ("RF†) and microwave amplification products, to TransDigm Group Incorporated ("TransDigm Group") (NYSE: TDG), a leading global designer, producer and supplier of highly engineered aircraft components. ...