05/04/2019 Hayabusa2 successfully fires a bullet at Apollo asteroid
Hyabusa 2 probe blasts asteroid with 'space bullet'
We Just Shot an Asteroid... for Science! | Space News
Hayabusa2 deployed what can be described as a free-flying gun with one "bullet", called Small Carry-on Impactor; the system consists of a 2.5 kg copper projectile shot to the surface by an explosive propellant charge. Following SCI deployment, Hayabusa2 also left behind a deployable camera to observe and map the precise location of the SCI impact.