18-Year-Old Charged After San Jose Bedroom Yields 27 3D-Printed Guns

Santa Clara County prosecutors say 18-year-old Jacob Reyes used two working 3D weapon printers in his San Jose bedroom to manufacture 27 finished or almost finished firearms, with ammunition also recovered and some weapons modified to act like machine guns. The district attorney’s office says all of the weapons seized from Reyes’ room except one were manufactured using the printers, and ABC7 identified that single non-3D-printed item as an additional illegal handgun.

Authorities recovered the printers and the cache at Reyes’ family home on Peach Court in San Jose, and prosecutors placed him under arrest on multiple felony counts tied to unlicensed manufacturing of firearms with a 3D printer and possession of a machine gun, among other related felonies. Santa Clara County District Attorney Jeff Rosen, whose Gun Violence Task Force investigated the case with the San Jose Police Department, warned that “There is a black market of weapons thriving right under our noses,” and added, “Once again, the DA’s investigators and their law enforcement partners have taken off the streets an arsenal of untraceable, illegal, and deadly weapons.”

Investigators from the DA’s Gun Violence Task Force worked with San Jose Police Department units GHOST and MERGE to execute the seizure, prosecutors say. NBC Bay Area reported the items were discovered in Reyes’ bedroom at his family home; ABC News and ABC7 report that two working 3D printers and 27 finished or almost finished guns were among the seized items, and that ammunition and machine-gun-style modifications were found in the residence.

Reyes was arraigned at the Hall of Justice in San Jose on Thursday on charges that include unlicensed manufacturing of firearms using a 3D printer and felony possession of a machine gun, and ABC7 reports he is expected back in court next week. Prosecutors say the case carries prison exposure if Reyes is convicted on the reported felonies.

Key factual details remain unreported by authorities: sources have not yet released the charging documents listing specific statutory counts, the exact date and time of the seizure and arrest, bail or custody status, whether digital design files or specific printer models were recovered, or whether any sales or distribution activity is alleged. Prosecutors have emphasized the law-enforcement impact of the seizure while court records and formal filing details are awaited at the Hall of Justice docket.

The case sits at the intersection of 3D-printing technology and criminal law enforcement: prosecutors cite an arsenal of largely 3D-manufactured, untraceable firearms removed from a single bedroom, and the Santa Clara County DA is moving the matter through the courts with the GHOST and MERGE units assisting the investigation. If convictions follow the arraignment and upcoming hearings, Reyes faces prison time under the charged felonies.