The macro "SMG Holo [But1ch]" for "RUST" can be downloaded and used on simple mouse and keyboard. Installing the macro is in the Keyran program and enhances your gaming experience!
Change the FOV parameter to 80 and the sensitivity to 0.75 to adjust the macro. Then try changing the FOV to 90 and the sensitivity to 0.85-0.89 (experiment with tenths for more accurate aiming).