Sierra Nevada Freedom is a proposed military training aircraft. It is a contender for the U.S. Navy.
Other contending aircraft include the Beech version of the M-346. Boeing has withdrawn from the competition as has Lockheed.https://www.msn.com/en-us/money/companies/boeing-will-not-bid-for-us-navy-s-new-trainer-jet/ar-AA25w0u7
See also Sierra Nevada Corporation
References