Most Nerf blasters use the standard Nerf Elite dart. Some series use colour variants of this Elite dart. The Nerf Elite dart is known of having an unstable trajectory and being inaccurate.

The Nerf Mega dart is larger than a Nerf Elite dart. Nerf Mega darts can only be fired from a Nerf Mega blaster or some other blasters that are made to fire Mega darts. These darts have a small hole in the orange tip, so that they wistle when they fly through the air. 

The Nerf Elite Missile, or Demolisher Rocket, is a large foam rocket. These rockets can be fired from some stand-alone blasters, or the Tri-Strike-stock attachement. These rockets are fun to shoot, and are worth more in some game types.

The Nerf Ultra dart is a more streamlined Nerf dart. They can only be fired by Nerf Ultra blasters. They are made from a styrofoam-like material, wich makes them more rigid than Nerf Elite or Mega darts. 

The Nerf Rival round is a ball. These balls are very bouncy. The Rival round can only be fired from a Rival blaster. The Rival series shoots these balls a bit harder than most Nerf blasters shoot their darts. The balls are also really accurate, but that's mostly because of the speed they get from a Rival blaster.

Rival rounds are round, this means that Rival blasters can (and some do) use a hopper-feeding system for a very high capacity (200+ balls) and very easy reloads. Check out the Rival Prometheus in 'Favorites' or 'Rival'.

The Nerf XLR-Disk is a Frisbee-style disk that three Zombie Strike blasters can fire. These disks are good for a large distance and they can bounce of walls for trick-shots. They are not very useful in a Nerf Battle, as you can't pick up darts from the ground to quickly reload. 

The Nerf Arrow is a special kind of ammunition, it is an arrow. These arrows can be fired by some blasters, like some Rebelle bows and the Zombie Strike Dreadbolt. These arrows are made of a thin, plastic shaft with a rubber tip and foam fins for a straight flight.