Composition A is a wax-coated, granular explosive consisting of RDX and plasticizing wax. Five varieties of composition A have been developed and designated as composition A-1, A-2, A-3, A-4 and A-5. Compositions A-4 and A-5, with desensitizer added, have been developed, but these explosives are not widely used. Composition A is used as the bursting charge in Navy 2.75- and 5-inch rockets and land mines.