//shield

#declare s1=merge{
object{cylinder{<-1.5,1.5,0><-1.5,1.5,0.5> 2.5} }
object{cylinder{< 1.5,1.5,0>< 1.5,1.5,0.5> 2.5} }
object{box{<-1.5,-1.5,0>< 1.5,1.5,0.5> } }
object{box{<-3.8,1.5,0>< 3.8,8,0.5> } }
}
#declare s2= difference{
object{s1}
object{cylinder{< -2.1,0,-.1>< -2.1,0,0.6> 2} scale y*.25 translate -y*1.5}
object{cylinder{<  2.1,0,-.1><  2.1,0,0.6> 2} scale y*.25 translate -y*1.5}
object{cylinder{<-6.4,4.3,-.1><-6.4,4.3,0.6> 3.2} }
object{cylinder{< 6.4,4.3,-.1>< 6.4,4.3,0.6> 3.2} }
object{box{<0,0,-.1><2.8,2.8,0.6>} rotate z*45 translate <-3.8,5.9,0>}
object{box{<0,0,-.1><2.8,2.8,0.6>} rotate z*45 translate <3.8,5.9,0>}
object{cylinder{<-1.4,8.1,-.1><-1.4,8.1,0.6> 1.7} }
object{cylinder{<1.4,8.1,-.1><1.4,8.1,0.6> 1.7} }
}

#declare s3= difference{
object{s2 translate -y*3.5}
object{s2 translate -y*3.5 scale <0.95,0.95,2> translate -z*.05}}

#declare shield= 
object{s3 scale 0.7 translate y*3.5}