Journalist

This game has additional zoom inside the scopes, so sensitivities should be smaller.

Actually most scopes are like this, the game is calculating the sensitivity scaling based on the FOV you see around the scope, not the FOV in the scope. So technically all scopes needs an update to reflect this.

Will modify the "max_value" over 100 bring any changes? 
{ "name": "FieldOfView", "type": "float", "value": 106.260205, "default_value": 80.0, "min_value": 70.0, "max_value": 120.0, "step_value": 5.0 } Will modify the file in install directory bring any changes? 
<Game Directory>\r6\config\settings\platform\pc\options.json
{ "name": "FieldOfView", "display_name": "UI-Settings-Video-Basic-FieldOfView", "description": "", "order": 2, "is_visible": true, "in_pre_game": true, "in_game": true, "update_policy": "immediately", "can_be_restored_to_default": true, "type": "float", "value": 80.0, "default_value": 80.0, "min_value": 70.0, "max_value": 100.0, "step_value": 5.0 }