Comedian Mike Epps could be facing serious legal trouble -- TMZ has learned authorities in his home state say they found a loaded gun in one of his bags at an airport.
According to legal docs, obtained by TMZ, police responded to a firearms investigation Sunday at the Indianapolis Airport ... with cops being told TSA found the gun while Mike was going through the checkpoint
The docs say the comedian mentioned being in town for a show, and forgot the piece was in his bag. Upon investigation, police say they found a .38 Special Airweight with 4 rounds loaded, but none in the chamber.
The gun and ammo were all taken as evidence.
Officials for the Indianapolis Airport police tell TMZ ... Epps wasn't arrested, but the report was forwarded to the Marion County Prosecutor's Office to determine if charges should be filed.
We've reached out to Epps for comment ... so far, no word back.