(NEW YORK POST) — The deranged Northern California gunman built two of the four weapons he used in his bloody rampage himself, authorities said.

Kevin Janson Neal — who killed five people Tuesday before being gunned down by police — fashioned a pair of AR-15 semi-automatic rifles from parts he purchased, the Record Searchlight reported.

“These firearms were manufactured illegally, we believe, by him at his home,” Tehama County Assistant Sheriff Phil Johnston said Wednesday. “So they [the guns] were obtained in an illegal manner, not through a legal process. They are not registered.”

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