Someone

$modelname sgc/sgc_minimalp.mdl
$cdmaterials "sgc"
$body "Body" "sgc_minimalp.smd"

$scale 0.5
$surfaceprop "metal"
$staticprop

$sequence "idle" "sgc_minimalp_s" fps 30

$collisionmodel "sgc_minimalp_phys.smd"
{
    //Mass in kilograms
    $mass 100.0
}