An example using the default gun :
Make another model, without the hands, just the gun, put it in the same folder as the other model, then change the bolded part to match the second models name :
datablock ItemData(GunItem)
{
category = "Weapon"; // Mission editor category
className = "Weapon"; // For inventory system
// Basic Item Properties
shapeFile = "./pistol.dts";
rotate = false;
mass = 1;
density = 0.2;
elasticity = 0.2;
friction = 0.6;
emap = true;
//gui stuff
uiName = "Gun";
iconName = "./icon_gun";
doColorShift = true;
colorShiftColor = "0.25 0.25 0.25 1.000";
// Dynamic properties defined by the scripts
image = gunImage;
canDrop = true;
};
Of course do this with the ItemData for the actual weapon, not the gun.