  We demonstrate, through numerical simulations, the controllable emission of
matter-wave bursts from a Bose-Einstein Condensate in a shallow optical dipole
trap. The process is triggered by spatial variations of the scattering length
along the trapping axis. In our approach, the outcoupling mechanism are
atom-atom interactions and thus, the trap remains unaltered. Once emitted, the
matter wave forms a robust soliton. We calculate analytically the parameters
for the experimental implementation of this atomic soliton machine gun.
