I dunno much about it I heard it was the most liked firearm of the Turkish armed forces that says alot with all the different designs they have. I believe T stands for titanium that is used in some parts again not to sure. Lots of videos on Youtube with them, some from the manufacture so you may ask questions from there they speak perfect english,. Also it would look much better if it had a Pictinny rail, just IMO.
Not the official armed forces pistol for some reason or the other Turkey uses many different pistols in the end not a good idea, because you have to stock so many different parts, not different calibers at least.