Prime Ballistic rubber blocks are heavy density rubber block which has excellent ricochet properties. It was tested for bullet penetration using different types of rifles & ammunition.

The purpose of this test was to determine the perpetration resistance using varieties of military type rifles & ammunition. The goal was to check number of rounds it would take to penetrate a single block shot in the 300mm direction and also how many blocks it would take to stop 100 rounds shot within a specified target area.