*Bang! Bang! Bang!*
The firing becomes much smoother the further Zhang Qin Feng goes. And by the time he arrived at the ground floor, the building he was in was already under heavy fire from the surviving soldiers.
This made Zhang Qin Feng pulled the Thunderbolt Mk-II out and get his weapon ready to fight against his opponent in a gunfight. Unlike all the battles he had before, this will be a fair battle because there won't be any advantage or disadvantage in this fight, unlike in the modern world.
Furthermore, his opponent won't be regular people like those he met in the modern world. In post-apocalypse, all his opponents will be people comparable to Alex, Shaun, Queenie, or even Satella's level of fighting ability.
*Thud!*
A heavy footstep came into the building's ground floor. This made the well-prepared Zhang Qin Feng immediately pull his trigger and fired continuously at the target entering the building.