Abstract: A muzzle-mounted chronograph for measuring velocities of projectiles launched from firearms. The chronograph includes a sensor module and a controller. The sensor module includes a first and second coils and a device for applying a stable magnetic field to the first and second coils. The controller determines a velocity of a projectile passing by the first and second coils based on detected variations in magnetic fields at the first and second coils.

Abstract: A muzzle-mounted chronograph for measuring velocities of projectiles launched from firearms. The chronograph includes a sensor module and a controller. The sensor module includes a first and second coils and a device for applying a stable magnetic field to the first and second coils. The controller determines a velocity of a projectile passing by the first and second coils based on detected variations in magnetic fields at the first and second coils.

Abstract: An apparatus for correcting trajectories variations of projectiles launched from a firearm is disclosed. The apparatus includes a control circuit for determining an appropriate impulse to be imparted into a projectile based on the measured velocity of the projectile, at least one steering coil, and a pulsed-power supply for discharging an amount of energy commensurate with the determined impulse to the steering coil such that a set of magnetic fields is produced to impart an amount of corrective kinetic energy into the projectile as the projectile passes the steering coil.

Abstract: An apparatus for correcting trajectories variations of projectiles launched from a firearm is disclosed. The apparatus includes a control circuit for determining an appropriate impulse to be imparted into a projectile based on the measured velocity of the projectile, at least one steering coil, and a pulsed-power supply for discharging an amount of energy commensurate with the determined impulse to the steering coil such that a set of magnetic fields is produced to impart an amount of corrective kinetic energy into the projectile as the projectile passes the steering coil.