How do you change a weapon scatter?

Good evening, I will want to modify my system so that there is no dispersion for the first shot but that the dispersion appears gradually.

“My system makes the shooting scatter already but from the first shot, that’s my only problem.”

If it is possible can you show me in image the modification to do?

Use a ‘SwitchOnInt’ then set int to 0 and use it to select the first shot then change int to 1 and select the scattered signal

Thank you very much, but I don’t see how I could change my system and it is possible to have an image of the changes to make, sorry I didn’t understand too much.