On Monday afternoon, MP George Christensen issued an apology via his Facebook page for his comments linking marriage equality and gun rights.
"My intention was simply to say that not everything the United States does should be followed," he wrote. "However, on reflection, it was a poor analogy to link the issue to guns and I do apologise for making that link."
Christensen went on to reiterate his support for the current definition of marriage as between a man and a woman, and called for a plebiscite to be held on the issue in Australia.
On Sunday night, Nationals MP George Christensen asked social media whether Australia wanted to follow the US on gun rights, as well as marriage equality.
Australia is known for its restrictive gun laws, introduced by prime minister John Howard in 1996 after a mass shooting in Port Arthur, Tasmania.
Under a federally funded gun buy-back scheme, over 640,000 guns were collected and destroyed. Certain semi-automatic and high-powered rifles were banned, and laws surrounding gun ownership were tightened.
According to research from the Australian Institute of Criminology, gun-related murders and suicides dropped sharply after the introduction of the new laws.