Is it possible to fit an Air to Ground package to the Tucano to give it a COIN capability?
Yep, the Brazilians have done it - designated the AT-27 and bought 133 of them. Believe it is for keeping the 'spear chuckers' of the Amazon basin under control / COIN, general security and patrol duties.
Looking at the Embraer website, they have now developed the A-29 attack version of the Super Tucano complete with FLIR, DAS, HOTAS, attack systems etc.
And don't be so silly .... why would we need something like that in our inventory. What good would that do against the Ruskies coming over the North Cape