Abstract: A strike plate unit that mounts to an automatic pistol to prevent the barrel and the slide of the pistol from being pushed rearwardly out of battery. The strike plate unit mounts to the accessory rail under the barrel of the pistol, and includes a secondary accessory rail that enables lights and other accessories to be attached under the strike plate unit while the latter is mounted to the pistol. The rearward face of the strike plate is positioned forwardly of the muzzle end of the barrel, to create a gap through which gasses escape in upward and outward directions to create a muzzle brake effect. The forward face of the plate is provided with heavy, sharply-pointed checkering that enhances its effectiveness as a striking weapon/tool.