The present invention, BullCharge, is a device that converts the charging handle of an AR, M4, or SR25 flat top rifle to a side charger. The BullCharger device is conveniently installed on either side of the Picatinny riser rail of the rifle using bolts and cap nuts through the slots on the flange of the BullCharger block. This installation does not require the removal of any existing components. By pulling the BullCharger handle backward, the rod within the block engages and pulls the rifle charging handle till the end. Subsequently, the BullCharger handle is released, causing the rifle charging handle to return. And a round is loaded to the chamber to set the rifle ready for use.