Federal Liberal Democrats senator David Leyonhjelm has snapped at a NSW Greens MP who wanted him to condemn a proud Sydney gun enthusiast backing his party.

The firearms aficionado, who in a Youtube video - since taken down - calls himself "The Sydney Militia", filmed himself brandishing an extensive gun collection and encouraging viewers to vote Liberal Democrats.

NSW Greens justice spokesman David Shoebridge alleges the man breached NSW firearms laws by unsafely handling and storing the weapons, and alerted police.

He called on Senator Leyonhjelm to distance himself.

"The video is disturbing because it not only flouts our firearms laws but does so in the context of the upcoming federal election," Mr Shoebridge said.

"It is obviously of heightened concern when firearms laws are breached in support of political aims."

But Senator Leyonhjelm responded to Mr Shoebridge in strong terms.

"A minor flurry today in response to that dickhead David Shoebridge pretending he knows something about gun laws," he posted on Facebook on Tuesday.

"I said he can go and get f***ed."

The Sydney Militia also hit back, saying Mr Shoebridge wanted him to lose his business and livelihood.

"David Shoebridge (sic) is willing to try and destroy my business, have me and my wife potentially lose our home and have our kids thrown out onto the street," he posted on Facebook.

"All because this man is so obsessed with firearms that even evicting children from there (sic) home is NOT a step too far for him and his crazy views on me owning firearms for my legal, licensed and insured business."

Federal Greens senator Lee Rhiannon said gun culture had no place in Australia.

"Any elected official with a genuine concern for public safety would be horrified to see someone supporting their political cause while flouting our firearms laws and calling themselves a local militia, but not Senator Leyonhjelm it seems," Ms Rhiannon said.

A NSW police spokeswoman told AAP the video will be reviewed for any offences to the NSW Firearms Act.