HOUSTON -- The owner of a Texas company that sells plans to make untraceable 3D-printed guns is free on bond after being accused by authorities of having sex with an underage girl.

Jail records show 30-year-old Cody Wilson was freed Sunday evening from the Harris County Jail in Houston after posting a US$150,000 bond.

Wilson was brought back to the U.S. after being arrested in Taiwan following accusations he paid a 16-year-old girl $500 to have sex with her in Austin. He was arrested Friday in Taiwan.

Wilson's attorney, Samy Khalil, said in a statement Sunday night that the focus is on preparing Wilson's defence.

Future court hearings will be in Austin.

Wilson owns Austin-based Defence Distributed, which was selling designs to make 3D-printable guns.