Nationals MP George Christensen has come under fire after he posted a social media post threatening ‘Greenie Punks’.

Mr Christensen posted a photo of himself to Facebook, appearing to be holding a gun, with the caption "You gotta ask yourself, do you feel lucky, greenie punks?"

Greens leader Richard Di Natale has said he was disgusted by the post’s content, and as such has reported it to the Australian Federal Police for further investigation.