Help with mobile mouse lock/touch lock

So basicly the Vietnam guns kit i have made for mobile but there is a problem with mouse

So when a mobile player tries to shoot it will shoot/hit where you touched on the screen mouse lock i have tried to do it locks the mouse but the touch is what it follows/points how do i do so mobile players can point where they wanna shoot not like this (Used emulator but its the same problem on mobile) sorry for low quality

https://gyazo.com/15485ed7bc9abeb954d98d2f4566f02a

I have tried some things here in devforum but they are just mouse lock and doesnt work as i want it to or what u gonna say