Anti-matter micro-flechettes, used in space combat.
Individual amat flechettes are needle size projectiles (3-4cm length x 0.70-1.2mm width) fired magnetically from a launcher at rates ranging from 10-100 rounds per second. Each contains from .01-1 gram of antimatter. The flechette is fired at a velocity sufficient to drive it into the target for a short distance on impact. In addition a small portion of the AM payload is configured to combine with the front portion of the flechette thereby converting it to a shaped high energy plasma sufficient to vaporize a small quantity of the target and clear a path for the bulk of the incoming antimatter payload. On impact the antimatter remaining in the flechette combines with the normal matter of the target it is by now embedded within, releasing 1.8e12 to 1.8e14 Joules of energy (depending on payload mass) and producing a damaging explosion and radiation flash.