This is a shield I made a month ago, which I plan to test with my homemade airgun. It was cast in a TV parabolic antenna, two layers of rebar were used. Sand was washed several times to remove dirt and clay. As you will see, the outside section is the weakest.
The inspiration came from the parabolic shape of Albanian bunkers and these two interesting bunker systems - Kugelstand, a 7-foot spherical concrete one-man bunker and "Moll-System" concrete bunker for two guards. Both of these two bunker systems were used by Nazi Germany in WW2. Not many of these concrete spheres were produced because the war ended, they weighted about 2000 kgs and were transported to the desired location.
Do you think these concrete spheres could be useful in modern warfare. Perhaps placing them in a densely wooded area to conceal them from air observation.
Beside it is a Kugelstand, a 7-foot spherical concrete one-man bunker designed to mount a machine gun (the mount is not visible in this photo). The bunker would be buried in the ground so that only the firing position was exposed. The Kugelstand pillbox only went into production in April 1945
This is the source of images. I recommend everyone interested in topic to visit this website.This was a "Moll-System" concrete bunker for two guards, manufactured by the Leonhard Moll concrete company of Munich. There were at least thirty of these concrete shelters for the guard force in the Obersalzberg area.