A 51-year-old U.S. Postal Service worker on Kauai is in federal custody on charges that he possessed a fully automatic rifle and used someone else’s firearms license to order a firearm from the mainland without the other person’s permission.

Troy Haruki Hamura, of Lihue, appeared in federal court Thursday afternoon wearing a white prison jump suit.

The Bureau of Alcohol, Tobacco, Firearms and Explosives said when its agents went to Hamura’s home last month to question him on the purchase of the firearm he ordered from the mainland, Hamura turned over to them 19 unregistered firearms, including the automatic rifle, an M-16A1.

When federal agents went back to the home Wednesday to execute a search warrant, they recovered 10 rifles and 20 handguns, all registered to Hamura, and 23 rounds of ammunition, Assistant U.S. Attorney Tracy Hino said in court this afternoon.

Hamura is not charged with any crimes involving the 30 firearms and ammunition.

The court’s pretrial services recommended releasing Hamura on bond pending a determination of probable cause on the charges.

Defense lawyer Keith Shigetomi said Hamura will work in his family’s business. His family runs Hamura Saimin Stand in Lihue.