NAPA, Calif. (KRON) — Napa police arrested a convicted felon and found a large stash of ‘ghost guns’ at his house, the Napa Special Investigations Bureau said in a press release. William Raab, 42, was charged with possession for sale of a controlled substance, convicted felon in possession of a firearm and convicted felon in possession of ammunition.

On April 29, Napa Sheriff’s Office deputies conducted a traffic stop and found Raab with a loaded .40 semi-automatic pistol, an extra magazine and ammunition. Raab is a convicted felon and was on probation for being a felon in possession of a firearm and ammunition.

NSIB obtained a search warrant for Raab’s home, in the 100 block of Berna Avenue. They found lots of non-serialized, privately manufactured firearms, also known as ‘ghost guns.’

Officers found an AR-10 assault rifle, three AR-15 assault rifles, three Glock-style pistols, three .22 caliber pistols and three .22 caliber rifles. They also found rifle magazines and more than 3,000 rounds of ammunition.

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In addition to the guns, police also found methamphetamine, cocaine, two pounds of marijuana and evidence of drug sales.