Rapper Rod Wave Arrested for Possession of Firearm, Attorneys Call BS

Rod Wave found himself in a jail cell this week -- this after cops arrested him on a firearm charge ... even though his attorneys are calling BS. The rapper was booked into Manatee County Jail Wednesday on two counts of possession of a firearm by a convicted felon -- and he posed for a mug shot on his way in. The exact circumstances that led to RW's bust are still unclear at this point. In any case -- his…