PUBG Hold to ADS
A lot of users who have came over to PUBG from other FPS games have been requesting that the ADS be changed from Toggle, to Hold. Essentially instead of clicking right mouse button once to scope in, that you hold it in to stay scoped, and that when you release it it un-scopes. That is commonly how it works in other FPS games, so it makes sense that people are requesting it.
In the latest September PUBG update, Battlegrounds released a new version to the test server and eventually the live server as of 9/14/2017. To make the changes you need to open up a text editor like notepad, and navigate to the following folder.
The InputModeADS command is near the very end of the file. If you can’t find it, you can hit Ctrl+F to search the document.
IMPORTANT: You may have to set the file to read only if the game keeps undoing your ADS settings. To make sure the setting sticks, right click > properties > check the read only box.