A Sterling Heights man pleaded guilty Friday to unlawfully exporting firearm parts hidden in toys to Australia, authorities said.

Rrok Martin Camaj, 34, entered the guilty plea in U.S. District Court before Judge Terrence Berg, U.S. Attorney Matthew Schneider said in a news release.

Officials say from March 2018 through January, Camaj sent firearm parts — including pistol frames, firing pins, springs, ejectors and magazines — through the mail to cohorts in Australia.

Camaj was not licensed to ship firearm parts, and to remain undetected, he hid the parts inside large motorized toy motorcycles, officials said.

"When Americans attempt to exploit the black market for firearms in Australia, we will respond and hold them accountable," Schneider stated in the release.

Australia has some of the strictest gun laws in the world with black market guns costing more than $15,000, according to the release.

Australian Federal Police seized the weapons in Australia and arrested three suspects before determining the guns originated in Michigan, officials said.

Vance Callender, a special agent with Homeland Security Investigations, was alerted by the Australian Federal Police. He said investigating international arms trafficking is a priority.

"HSI stays vigilant to deny transnational criminal organizations the ability to use arms to promote criminal activity overseas," Callender said. "HSI will continue to work with our foreign and domestic law enforcement partners to fight international arms smuggling to ensure the integrity of our borders."

srahal@detroitnews.com

Twitter: @SarahRahal_