Police have charged a central Queensland man with 3D printing firearms, amid a concerning rise in the technology being used to create weapons.Gladstone detectives searched an Agnes Water property on Rafting Ground Road, about 500km north of Brisbane, on March 17.Officers allegedly found a 3D printer in the midst of manufacturing weapons parts, along with magazines loaded with ammunition and multiple 3D printed handgun frames and Glock sliding mechanisms.A 40-year-old man was taken into custody.He has been charged with multiple offences, including unlawful possession of weapons, manufacturing weapons without a licence and possessing and distributing blueprint materials for manufacturing weapons.He remains in custody and his matter is due to return to the Gladstone Magistrates Court in May.Gladstone Criminal Investigation Branch officer in charge Detective Senior Sergeant Brett Richard said the increasing use of the technology to create "dangerous and unlawful" firearms was a concern.Police are continuing to investigate, and urge anyone with information about illegal firearms or manufacturing equipment to come forward.