A man has been charged after police allegedly found an AK-47 assault rifle in a western Sydney house, in what officers describe as a rare find. Police from the Middle Eastern Organised Crime Squad raided a house on Brennan Street, Yagoona, about 3.30pm yesterday. They allegedly found the gun, a 30-round magazine and a military helmet, before arresting the 46-year-old man. "It's quite rare that we find AK-47s in NSW," a State Crime Command spokeswoman said. "[They're] not something that you come across regularly." The man was charged with possessing a prohibited firearm and not storing a firearm safely. He was due to appear in Bankstown Local Court today. In August last year, police charged a Hells Angels associate after allegedly finding two of the guns in his home in Claremont Street, Merrylands. The AK-47 is a lightweight, automatic rifle known to be the weapon of choice for members of the Taliban and al-Qaeda, among many other fighters around the world. The weapon found in yesterday's raid will undergo ballistic examination, police said.