The double-layer “Snail” is an improved version of the “Snail 10”, which provides protection against mortar and light armor-piercing shells, as well as direct hits from the BM21 “Grad”.
The structure is built in such a way that there is a space between two metal walls to be filled with sand, crushed stone or concrete. It is possible to make a two-layer snail with a loophole for firing.
Such a shelter is recommended for installation in front-line areas, where the intensity of shelling is many times greater. The place of installation and equipment will depend on your wishes, and the order will be fulfilled as soon as possible!