SPRINGFIELD — Gun rights advocacy groups filed a federal lawsuit Monday against the Illinois State Police claiming that the office in charge of handling Firearm Owners Identification card applications is unconstitutionally delaying that process.State statute dictates that “no person may acquire or possess any firearm, stun gun, or taser,” or ammunition, without having a state-issued FOID card. ISP has 30 days from the date it receives an application and filing fee to either approve or deny that request …