This thing is insane. I want to build a time-machine, just so I can go back to my childhood with one of these, and take over the neighborhood.
The front grip of the NERF N-Strike Stampede ECS Blaster converts to a bipod and you just release the clip and squeeze the trigger, and the gun unloads the clips at a rate of about 3 per second. According to Nerf, this is the first fully automatic clip system blaster to date. Clips on average travel as far as 50 feet. You get 3 clips that hold 18 bullets each plus you get a 6 round. In total, the package comes with 60 darts.
The NERF gun is pretty heavy (takes 6 D batteries) so its probably best for a kid over 8 years old.