well I'll be fast:
1) put a gun.
2) set the maximum spread in radians of the weapon with a timer or with a region to "0".(trigger)
3) and to ensure accuracy set the accuracy of the weapon in degrees at "0" [This is because some weapons are not left with all the accuracy of the first trigger]
example: https://www.plazmaburst2.com/?s=9&a=&m= ... &id=962104