In 2005,Indonesian Marines PT-76M are in upgrading status,at that time Indonesia need new light tank to have similiar or even better capability than the PT-76M,then comes the LTs tank series,the most advanced and one of the best LT series is LT-5,with cannon size of todays MBT,this tank could even destroy MBTs from front without using ATGM like todays light tank and instead using its main gun,and its also have Active Protection System like Russian Shtora,but Indonesian Active Protection System performs exceedingly better,the tank could also submerge and have turnable propeller,enjoy! AG1=Active Protection System,AG2+VTOL/Trim=Fold Floaties,AG3+VTOL&Trim=Turret, you can find more of the function by using AGs and Slider