Omaha Man Using a 3D Printer to Convert Glocks to Machine Guns Sentenced to 57 Months

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FILE PHOTO: Signage is seen at the United States Department of Justice headquarters in Washington, D.C.

United States Attorney Jan Sharp announced that Riley Griffy, age 29, of Omaha, Nebraska, was sentenced today in federal court in Omaha for unlawfully possessing a machinegun.  Chief United States District Judge Robert F. Rossiter, Jr. sentenced Griffy to 57 months of imprisonment.  There is no parole in the federal system.  After completing his term of imprisonment, Griffy will begin a 3-year term of supervised release. 

On April 15, 2021, Griffy sold a 3D printed conversion device which converted a semiautomatic Glock pistol into an automatic weapon.  Griffy used a 3D printer to build the device, which is a machinegun as defined by federal law.  Griffy continued illegally manufacturing machineguns which converted firearms into automatic weapons until he was arrested on June 2, 2021.  In total, Griffy manufactured and sold nine machineguns and one silencer.

This case was investigated by the Omaha Police Department, the Federal Bureau of Investigation, and the Bureau of Alcohol, Tobacco, Firearms and Explosives, and were part of Project Safe Neighborhood (PSN), a program bringing together all levels of law enforcement and the communities they serve to reduce violent crime and make our neighborhoods safer for everyone. The Department of Justice reinvigorated PSN in 2017 as part of the Department’s renewed focus on targeting violent criminals, directing all U.S. Attorney’s Offices to work in partnership with federal, state, local, and tribal law enforcement and the local community to develop effective, locally based strategies to reduce violent crime.