I'm not trying to be rude here, but it absolutely isn't what anyone with any knowledge of SAM or AA missile warheads would expect. The frag from missile warheads is produced by scoring the inside of the warhead casing. The fragments are designed for a specific destructive effect and range in size from 5 x 1 inch long rods to 1.5 x 1 inch cubes depending on the warhead and missile. The warheads are made of hardened steel. They have to be heavy and strong to ensure the kenetic energy of the fragments is enough to penetrate their target. 5mm, non-metalic beads wouldn't even be useful as birdshot, nevermind missile frag.