The three men arrested Friday outside Foy TMs Supermarket all faced charges for exchanging guns outside the store's parking lot.
Police found three weapons inside the vehicle.
It was a nine millimeter assault rifle, a .40 caliber handgun and a 30H Special handgun.
Alfredo Cisneros, 37, from Weslaco faces unlawful possession of a firearm by a felon.
Celestino Trejo, 28, from Alamo faces unlawful possession of firearm by a felon and possession of cocaine.
Ray Reyes faces unlawful possession of a weapon.
All three are not cooperating with police and have been giving conflicting information.
PD got warrants to search their homes. They did not find anythink that links them to gangs or organized crime.
Police say one of the guns was stolen, but dont know which one.