I made this guy with a little inspiration from one of Brian Kescenovitz's Dawn Forge mech.
AI3 stands for Anti infantry 3rd model.
The A13 is usually controlled by a leutenant, or any other high ranked officer. Armed on it's right is a dillon( I know it's incorrect but my newer version has a correct dillon) for dealing with any infantry in it's sight. On the left is heat seaking missile for any aircraft, although it can only be used once before a reload is necessary. On the other side of the HSM is a DTR(Digital tracer rocket)for if any vehicles are needed to be spotted by air forces, such as tanks.