Metal Gear Solid 5: The Phantom Pain Strange Circle

It looks like part of the "Nahimic Sound Tracker" software that comes with some MSI graphic cards. You can find more information about it here. According to the official site,

You can disable the Sound Tracker by switching OFF the button on the bottom left of its page. In game, you can also use the hotkey CTRL + SHIFT + S to turn OFF or ON the Sound Tracker.