Taken from Ska Wars goes Forth:

Rifleman = German w/ WWI Stahlhelm
Stosstruppe = WWI Stosstruppe
Sturmtruppe = WWI Rifleman w/ Gasmask
Sniper = Camoflagued WWI Rifleman
MG-Shutze = WWI Rifleman w/ Prussian Helmet
Unteroffizier = WWI Rifleman w/ Cap

If anyone needs pics I can get them.