Nailbiter Toy Blaster Features 8-Dart Indexing Clip – For Fast Firing With No Priming. Pull The Trigger To Launch A Dart, The Clip Automatically Moves The Next Dart Into Ready Position. Customize With The 8-Dart Storage Stock And Extending Barrel – Keep Darts In The Storage Stock For Fast Reload. Attach The Extending Barrel And Twist To Adjust The Length. Includes 16 Zombie Strike Darts – Official Nerf Zombie Strike Elite Darts Are Tested And Approved For Quality And Performance And Constructed Of Foam With Flexible, Hollow Tips. Includes Zoom & Doom Accessories – Extending Barrel And Storage Stock Compatible With The Nailbiter Blaster And Other Nerf Survival System Blasters. Part Of The Zombie Strike Survival System – Defend Against Zombie Attacks With The Nerf Zombie Strike Survival System Blasters And Accessories (Each Sold Separately)