The Nerf Master Blaster was a great Nerf gun in its time. The gun was eventually made obsolete by the superior Nerf Ballzooka, but the Master Blaster was the first push-handled Nerf gun that fired both when you pushed the handle forward and pulled it backwards.
The Nerf Master Blaster was a lot of fun to play with, even though the gun would occasionally misfire or shoot two balls at the same time.
