A high grade bullet modified to punch through heavy body armor and armored vehicles.
While not usually found in submachine guns and pistols, the anti-preaching round is made for assault rifles. These rounds are specially coated in heavy metals that allow them to go through body armor. This causes the entrance wounds to be small while the exit wounds are much longer. Since the Anti-Preaching round expels a lot of energy to get through the body armor, the bullet will tumble when it hits soft tissue, causing a lot of internal damage.