Rapper Bankroll Fresh -- Shot Dead

Rapper Bankroll Fresh was shot to death Friday night.

Cops say gunfire erupted outside an Atlanta recording studio. The shootout was bedlam ... more than a dozen shell casings were found. We don't know if anyone else was hit.

2 Chainz -- also from Atlanta -- tweeted about the "Hot Boy" rapper's death ... "Man I'm a fan of Bru and always will be, I'm in shock at the moment !! Senseless deaths we just got to stop it, I'm speaking up now."

So far, no suspects, but cops are on the hunt.

Bankroll was 28 years old. RIP.