About this 3D model
This 3d model i 99% accurat to the mk 46 helmet in Civil War, it was created from orthographics screen grabs of the CGI model used in the movie. This is also the same helmet the mk 47 armor uses in the new spiderman movie. The scale is set to so the width of the helmet is 20,2 cm. You will need to cut the helmet to fit you're buildplate.