Dothan police arrested 31-year-old Whitney Flowers during a routing traffic stop.
The officer reportedly noticed a 12-gauge shotgun in Flowers' vehicle.
The ID number on the weapon had been scratched off.
Flowers is charged with altering identification on a manufactured firearm.
In an unrelated case, police arrested 37-year-old Heath Allen Keith.
He's accused of stealing a vehicle from a parking lot in the 1100 block of 3rd Avenue.
Authorities say they later spotted the stolen vehicle at a gas station in Ashford.
Keith is being held in the Dothan City Jail charged with 1st degree theft of property.