I'm remodeling a home that had an indoor shooting range. I removed the ballistic rubber blocks and steel plate backstop; not sure the brand, but they are really dense and seem to be in good shape.

There are:
18 blocks that are 36x9x12
18 blocks that are 12x9x12
12 squares that are 24x24x2
3 steel plate that are 26x96x3/8 with 4 inch wide plates welded on the seams for overlapping on install

Located in BCS
Asking $2,500
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Tried to show the full setup and the layers of install in the photos.