SEWARD, Neb. -- A Washington man is facing weapons charges after being found with six rifles with their serial numbers removed.

The Seward County Sheriff's Office says they pulled over a car Monday afternoon on I-80 for a traffic violation.

Authorities say a search turned up six M4 semiautomatic rifles, all with their serial numbers removed by a grinder.

The passenger, 31-year-old Montray Patton, claimed the guns.

Authorities say Patton is a convicted felon who has ties with a motorcycle gang in Washington state.