A quick note on recoil in zero-G.
Unless you are useing hollywood recoil levels, most slugthrowers are not going to do much more than push a little bit. Anything that kicked hard enough to throw the firer around would also break his shoulder.
As for long bursts, again that is mostly hollywood, or poorly trained people. In the US Army you train very little on sustained auto-fire. Rapid aimed fire is more of what they stress. Considering that basic physics are not going to change, it will most likely be the same in the future.
Unless you are useing hollywood recoil levels, most slugthrowers are not going to do much more than push a little bit. Anything that kicked hard enough to throw the firer around would also break his shoulder.
As for long bursts, again that is mostly hollywood, or poorly trained people. In the US Army you train very little on sustained auto-fire. Rapid aimed fire is more of what they stress. Considering that basic physics are not going to change, it will most likely be the same in the future.