Lightningwing was shocked that the man was not only alive, but now firing electrical rounds! Lightningwing did not have a chance to dodge them so he created a small shield made up of protons,taking up some of the electrons out of reflexes he built when he was ranching with his grandfather.The shield absorbed enough to take two bullets but the third one pierced through the invisable shield, hitting Lightningwing towards the ground hard. He was moving very slowly,but he had already done a counterattack, the atoms that were moving in front of the gun-wielders face began to move very rapidly,stricking against another, probably causing atomic burns(if them man had his mouth open,perhaps radiation sickness due to the atoms stricking amonst another), cuts that could probably turn into scars and at the very least temporairly blindness due to the heat and the electromagnatic pulses.
If the man could not counter the atomic assault, Lightningwing would proceed to use his atomic powers to slowly bring the man's guns sliding against the ground towards him via electromagnatism as he slowly got up,stunned hard but still able to move slowly and process thoughts.Lightningwing would walk towards the man then he flip the unconcious man's body over his shoulder, and walk and throw him promptly in the nearest jail.
If he somehowed blocked it, Lightningwing would use the static ammunition in his gun to rub against the gunpowder very rapidly setting off the gun in his hands,probably not making able to move a finger again. Either way, the man could be seriously hurt, but at the point Lightningwing did not care.