Upgrade your grunts to "Steel Warriors" mechanised assault troops with these gas masked and helmeted heads
 
DIGTIAL VERSION - DOWNLOAD THE FILES TO PRINT YOUR OWN
 
Goggles up and goggles down versions included
Includes heads and re-breather pipes as 1 part or split to allow more head posability.
 
Pre-supported versions also included
Example of image included as suggestion of use only. Unofficial upgrade part.