HOUSTON, Texas (KTRK) -- A 43-year-old Houston man has been indicted for possessing a bump stock, the first known case in the country since the device was banned.Ajay Dhingra has been indicted on four counts of firearms violations, including possession of a machine gun, specifically a bump stock.The indictment also alleges that Dhingra unlawfully possessed a firearm after having been committed to a mental institution.According to the U.S. Attorney's office, Dhingra left a concerning message at the George Bush Foundation.Law enforcement contacted Dhingra at his home where they found a rifle with an installed bump stock.A search warrant was obtained and authorities found a Glock pistol, a Colt rifle with a bump stock and 277 rounds of 9mm ammunition.If convicted of any of the charges, Dhingra faces up to 10 years in federal prison and a possible $250,000 fine on each count.