A muzzle brake for a gun having a substantially cylindrical body intended to be positioned in the extension of a gun barrel. A split gate electrode structure is formed in a memory cell region of a substrate. In the disclosed stacked semiconductor substrate, the logic circuit area is placed on the memory cell area and these two areas are electrically connected by a metal interconnection, thereby decreasing the size of the semiconductor devices. In some embodiments, the motion detector can include a switch actuator, a notched lever, and a switch.