The M103 was designed in 1948 and saw action until 1967, when the research of main battle tanks advanced. this made the M103 heavy tank obsolete and out of date, so the production of the M103 stopped, but about 350 of the M103 were built by this time. (To run this tank properly, you need to download the 120mm gun mod. controls are basic, AG1 to activate movement of hull, AG3 for the machine gun, pitch and roll to drive (you can traverse without driving), VTOL for the movement of the turret, and trim for the gun elevation/depression. okay, now that I got that out of the way, I know this isn't exact but I will try to improve on it, so make some suggestions