A South Amboy man has been charged with multiple weapons offenses and illicit sexual communications with someone he believed was a minor, the Acting Attorney General's office said Monday.

According to court documents, an undercover officer posing as an underage girl on social media was contacted by Oskar Smieszek, 23, in April 2025. Smieszek allegedly discussed meeting the girl for sex and sent sexual images, officials said.

A search warrant executed Feb. 6 at Smieszek’s home led to the seizure of multiple digital devices, two unregistered firearms and several high-capacity magazines, authorities said.

“The charges announced today reflect two major areas of enforcement of our office – protecting children from sexual predators and protecting everyone from gun violence,” said Acting Attorney General Jennifer Davenport in a statement.

Smieszek is charged with manufacturing an unregistered firearm with a 3D printer, possessing an unregistered assault firearm, possessing large-capacity ammunition magazines, attempted impairing the morals of a child and attempting to show obscene material to a child, authorities said.

“So-called ‘ghost’ guns that are made with 3D printers are untraceable, but no less deadly than other weapons. And anyone who tries to use the anonymity of social media sites to prey on children should understand that they will be held accountable,” said Davenport.