I was watching the video clip in the above story when I suddenly hit upon the idea of having a speaker at the base of the drop-down target. This could simulate the sound of return fire, which would make the live-fire training more realistic.
Simulating returning fire may "encourage" soldiers to fire from behind cover, instead of firing in the open.
Instead of a target that pops up, the target could simply stay in a figure 15 exposed (head showing) position, and then emit the opening shot for the soldier to react and take cover. The soldier then returns fire, and when hit, the target drops down, and stops emitting sounds of rifle fire.