Authorities arrested a man and his grandson on accusations of manufacturing AR-15 assault rifles.
Police identified the suspects as 18-year-old Clayton Hobby and his 64-year-old grandfather, Kerry Schunk, who was helping the teen.
Officers found and seized multiple ghost gun AR-15 rifles, one of which was converted to shoot fully automatic.
Investigators also found 15 high-capacity magazines, three ghost gun polymer handguns and some 1,000 rounds of ammunition.
Hobby faces criminal possession of a pistol and ammunition, possession of an assault weapon and high-capacity magazines and manufacture of a machine gun.
Schunk faces conspiracy to commit criminal possession of an assault weapon, pistol and ammunition and conspiracy to commit possession of high-capacity magazines and manufacture of a machine gun.
Hobby and Schunk appeared in court and their bonds were set at $500,000 and $25,000, respectively.