automatic fire system augment

there are 3 i cant seem to fined they are Automatic Fire System, Burst Fire System and Single Fire System all the rest can buy

I know there 3 fire rate mod i'm looking for burst fire one.I pick automatic because most prefer automatic but i can't find any of them. I'm Still looking ☹️ 

It's a  bug said lan frazier on Twitter 

still missing today

😞  .....

I was really hoping the patch would fix this...  ☹️