Umarex Brodax BB revolver Uses one 12-gram CO2 cartridge Picatinny rails 375 fps This revolver is ready to take on a fun day of plinking! The Brodax is an air-powered revolver boasting modern styling and dual Picatinny rails for mounting a red dot sight, laser or flashlight. This pistol features a lightweight polymer frame with internal metal parts including the trigger and hammer. The CO2 capsule is concealed in the frame of the grip, and a hex tool for tightening the capsule is integrated into the grip plate to prevent you from losing it. The safety is cleverly placed at top of the grip behind the hammer, and has a low profile so that it doesn't distract from the sleek appearance of the revolver.