General Dynamics Armament and Technical Products, which is based in Charlotte, has won a contract with the U.S. Army that could be worth up to $750 million.

The U.S. Army Research, Development and Engineering Command picked the GD unit to produce joint biological point detection systems for an initial amount of $25 million. If all 1,089 units are produced, the deal is worth $750 million, GD.

Forty percent of the work will be done in Charlotte.

The detection systems are self-powered units designed to detect and identify biological warfare agents. They are a joint effort for armed forces.