JOHNSTOWN, Pa. (AP) — A Pennsylvania man awaits sentencing after pleading guilty Thursday to charges that he bought and sold guns and gun parts that had been stolen from a federal disposal facility.

Richard Adam Schreiber, 38, of Everett, pleaded guilty to five federal counts related to the thefts by a contract security guard at the National Firearms and Ammunition Destruction Branch in Martinsburg, West Virginia.

His attorney, Dan Kiss, said in an email that Schreiber “has accepted responsibility for his actions in this matter by his plea today.”

The former guard, Christopher Lee Yates, is serving a lengthy federal sentence. Yates told investigators he would arrive at work early and take guns, gun parts and ammunition that had been seized during criminal investigations or were retired by federal agencies, authorities said.

The investigation began when a firearm was seized in Philadelphia with conflicting serial numbers, including one linked to the federal firearms destruction facility.

Prosecutors said agents with the federal Bureau of Alcohol, Tobacco, Firearms and Explosives seized 101 firearms, 1,352 slides and 123,000 rounds of ammunition from Schreiber. They also recovered 28 firearms, including three machine guns, from people who bought them from Schreiber.

Schreiber remains free on bond and will be sentenced in August in federal court in Johnstown.