Several variants are manufactured about the fighter’s lifespan. These have involved the T-45A, which happens to be a two-seat variant also used by the US Marines, and also the T-45C, an upgraded Variation which has a glass cockpit and other augments, which currently serves as a design for T-45s nonetheless https://www.fcc.gov/fcc-bin/bye?https://kowear.com/american-fighter/