The macro "M249" for "RUST" can be downloaded and used on simple mouse and keyboard. Installing the macro is in the Keyran program and increases your skill level in the game, if you follow the instructions!
This macro is designed for automatic firing of the M249. It is configured to use 8x sensitivity with a parameter of 0.6 and a field of view of FOV 80. The M249 has a small margin of deviation, but you can adjust the resolution as you wish.