General Dynamics C4 Systems said the system ordered is the handheld, manpack, small form AN/PRC-155. A total of 3,726 units will be produced for the Army under an award worth about $306 million.
Vehicle integration kits and accessories are included in the contract.
"With the game-changing PRC-155 networking radio, soldiers can be confident they will have access to lifesaving voice and data communications," said Chris Marzilli, president of General Dynamics C4 Systems.
"The AN/PRC-155 Manpack is the most rigorously tested radio in the Army's arsenal. This order, along with the 19,000 AN/PRC-154 Rifleman radios already under contract, moves the Army one step closer to achieving its brigade modernization strategy."
General Dynamics said the radio has been certified by the National Security Agency to communicate classified voice and data at the Top Secret level and below.
The company had received an order last year for 100 of the radios.