Blac Youngsta Arrested on Felony Weapon Charge, Cops Say Pistols Found in His Louis Vuitton

Blac Youngsta is behind bars in Houston after cops say the rapper was carrying prohibited ammo when they pulled over a car in which he was a passenger.

Law enforcement sources tell TMZ … Youngsta and 3 friends were driving around H-Town Wednesday afternoon in a GMC Yukon — with BY in the backseat — when cops pulled ’em over for running a red light. We’re told the officers smelled marijuana, so they searched the car and found 3 pistols and weed.

According to the criminal complaint, Youngsta is charged with felony possession of a prohibited weapon — specifically, armor-piercing ammunition. It’s unclear if the ammo was loaded in a handgun or separate.

We’re told another passenger, Marcus Dion Cartwright, was charged with unlawfully carrying a weapon. The 2 other people in the vehicle were NOT charged.