The AT-6 is artwork indeed, as it is only in the very early stages of being certified to drop weapons. One of the many drawbacks of the AT-6 is it’s lack of an internal gun which necessitates the carriage of two underwing pods. Gun pods are notoriously unreliable and greatly reduce the performance of the already underpowered Texan II (see Fred George’s recent article in Flight International).
It does have a significant advantage, though. In addition to being an American product, it shares commonality with the USAF fleet of T-6AII trainers.