The Pentagon said Wednesday it planned to sell 60 Patriot missiles to Kuwait in a deal worth an estimated $4.2 billion, as the emirate tries to bolster its defenses against the threat from Iran.

The Defense Security Cooperation Agency (DSCA), which is in charge of U.S. weapon sales to foreign countries, notified the Congress of the intended sale on July 20, the agency said in a statement on its website.

Congress has 30 days to raise any objections it may have. If nothing is said, the contract is deemed valid after that waiting period.

The deal involves the sale of 60 Patriot advanced capability (PAC-3) missiles, 20 launching stations, 4 radar systems and control stations, personnel training and training equipment, and spare parts, the DSCA said.

“Kuwait will use the PAC-3 missiles and equipment to improve its missile defense capability, strengthen its homeland defense, and deter regional threats,” DSCA said.

In 1992, it bought 210 of the earlier-generation Patriots, and 25 launchers. In 2007, it bought another 140 Patriot missiles.

Source: Defense Security Cooperation Agency