Nerf Stryfe

The Stryfe is a small, clip-fed, semi-automatic flywheel blaster. It features a small acceleration trigger which allows for the blaster to be powered up for firing. It also has two tactical rails, a small one below the muzzle and a long one at the top rear of the blaster. There are barrel extension and shoulder stock attachment points as well. The clip release button is located in front of the firing trigger.

The muzzle has a counter-clockwise rifled texture, similar to the Retaliator's barrel extension. Opening the top jam door slows the flywheel faster than normal; this appears to be a safety mechanism and works even if power is lost before the flywheel stops spinning.

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