´It was narrated that Ibn Az-Zubair said:` "Whoever wields a weapon and starts to strike (the people) with it, it is permissible to shed his blood."
Explanation & Benefits
Hafiz Muhammad Ameen
“He began to fire”—whether anyone is killed or not, the prescribed legal punishment (hadd) for the one who fires a weapon is execution, because he is intent upon killing people. And Allah knows best.
Source: Sunan Nasa'i: Translation and Benefits by Shaykh Hafiz Muhammad Amin Hafizullah, Page: 4104