Nerf Hyperfire

The HyperFire is a Nerf blaster that was released in fall of 2016 under the N-Strike Elite series. It requires four "D" batteries to be operated.

The HyperFire is a fully automatic flywheel clip system blaster. It features an integrated shoulder stock and a grip located in front of the magazine well. It has a single tactical rail above the front end of the blaster and has four strap points: two on the front end, and two on the back, built into the stock.

Unlike most flywheel blasters, it uses a conveyor system to feed darts into the flywheels, rather than a pusher mechanism. This conveyer system has a faster rate of fire than a pusher mechanism, despite this, it is known to jam on old, worn darts due to the fact that it doesn't have enough grip to slide it into the flywheels smoothly. It also has canted flywheels which induce a rifling effect on fired darts, increasing accuracy.

Source: http://nerf.wikia.com/wiki/HyperFire