Nerf Dart Tag Swarmfire The rotating barrel lets you deliver rapid blasting action and the removable stock lets you take your blasting action on the go. When your opponent is in sight, grab your blaster and send your DART TAG darts flying  theyll even whistle as they fly. Blast your way to victory! Electronic blaster lets you dominate the game with a full-auto 20-dart attack! Blaster features a rotating barrel for rapid blasting and a removable stock for high-mobility attacks! Blaster comes with 20 DART TAG darts. Requires 6 C batteries (not included).