When you fire eg a pistol, the recoil makes your arm move all over the place (so the next shot can be way off-target).
Instead, the gun user should wear a series of electrical stimulators embedded in a long thin glove on his arm.
As trigger pressure is sensed, the stimulators jab the arm in a pattern across different muscles.
These cause reflexes to fire which get the muscles to exactly counteract the motion of the arm caused by the recoil.
Thus even the first shot can be better targetted but subsequent shots can be improved hugely. This could be adapted for 2 handed weapons.
Since this works by provoking reflexes, any conscious concerns of the gun firer, causing eg tension, are simply overridden (related technology has been developed to lessen spinal pain).
