This is based on the Marine model, with a darker uniform, removal of team colour (no insignia in battle), the addition of foliage to the helmet, camo-paint, and of course the AK47 has been replaced with an MP5.
I have now done a version of GarretSidzaka excellent modern paratrooper with the MP5, no team colour, SAS beige beret. This is more in keeping with the other Civ 4 units.
Feedback welcome in the Comments Thread
British SAS 2016-10-05