@Carlos Resurreccion Yes you can, check the information below and it should be pretty self-explanatory, let me know if you need any help.
Please also read my post before yours, where I explain an in-game workaround.
@DPI Wizard It would indeed be great if you can add a "config" option for Insurgency Sandstorm.
To help you out, here is some information to reference:
Config file path (main game)
%localappdata%\Insurgency\Saved\SaveGames\Profile
Config file path (CTE version of the game)
[SteamLibrary]\steamapps\common\sandstorm_beta\Insurgency\Saved\SaveGames\Profile
Config file name
Controls.json
Translation of your website name for multiplier to the config file tag name:
Look Sensitivity --> mouseSensitivity
Aim Down Sights Sensitivity --> aimingSensitivityScale
Scope Sensitivity --> scopeSensitivityScale
Focus Sensitivity --> focusSensitivityScale
1.0X Sensitivity Scale --> OneX
1.5X Sensitivity Scale --> OneHalfX
2.0X Sensitivity Scale --> TwoX
2.5X Sensitivity Scale --> TwoHalfX
3.0X Sensitivity Scale --> ThreeX
4.0X Sensitivity Scale --> FourX
6.0X Sensitivity Scale --> SixX
7.0X Sensitivity Scale --> SevenX
Note that all these sensitivity value tags except the first one ("mouseSensitivity") exist inside both the mouseSensitivityModifiers "group" as well as gamepadSensitivityModifiers "group". Obviously these need to be adjusted in the mouseSensitivityModifiers part.
I've attached the first part of my Controls.json file for reference.
Hope this helps
SandstormControlsSensitivitiesPartOnly.json