General Dynamics Land Systems has been awarded two Army contracts to upgrade the M-1 Abrams main battle tank.

The contracts call for upgrading the Abrams M1A2 System Enhancement Package Version 3 (SEPv3) to create a SEPv4.

The first contract, valued at $331 million, is for SEPv4 upgrades that include “the Commander’s Primary Sight (formerly known as the Commander’s Independent Thermal Viewer), an improved Gunner’s Primary Sight and enhancements to sensors, lethality and survivability,” according to a news release by General Dynamics, which will deliver seven prototype M1A2 SEPv4s.

The second contract, worth $270 million, is for production of 45 Abrams M1A2 SEPv3 tanks. “The first pilot vehicles, which feature technological advancements in communications, reliability, sustainment and fuel efficiency and upgraded armor, are expected to roll off the production line in fall 2017,” General Dynamics said.