Dave,
A VERY good effort for your first military model.
The Loader's MG is mounted on a Steel Scate Rail (the curved flat piece raised slightly off the turret), which should be a bright steel finish (pictures from Prime Portal):
To make the Mobility Equipment Research & Design Command (MERDC) style camo pattern more accurate, you need more of the tan and black stripes in the pattern.
MERDC ![](../../../data.primeportal.net/tanks/mu_yeol_lee/k1a1_mbt/images/k1a1_mbt_09_of_27.jpg)
But, these are only to help you improve. You have done quite well as it is!