Indeed, MM lacks a procc.
You could probably make a 1 button macro as MM and still do decent dps with it nowadays. :|
Edit:
Decided to make myself a LFR macro, using SF.
/castsequence reset=20, Chimaera shot, Steady shot, steady shot, aimed shot, steady shot, aimed shot, chimaera shot, steady shot, steady shot, aimed shot, steady shot, steady shot, barrage
Works like a charm, 2nd CS is a bit delayed, but does the job.
Just do your opener like you normally would, then instead of using your normal CS, just start using the macro instead and voila, /afk till RF is up again.
Also, its pretty sad that it actually works as well as it does