Nerf Demolisher

The Demolisher 2-In-1, also known as the Demolisher, is a clip system Nerf blaster that was released in fall of 2014 under the N-Strike Elite series. It is operated by four "AA" batteries.

The Demolisher 2-in-1, as its name suggests, is essentially "two blasters in one". It features a top clip system dart-firing blaster and a small, bottom missile-firing blaster. It uses a flywheel system and has a acceleration trigger to allow the user to rev up the motors for use. The missile blaster is permanently integrated into the blaster. The blaster is about the same size as the RapidStrike CS-18 in its prototype stage. The missile launcher is entirely independent from the dart launcher; therefore, it follows that the acceleration trigger is irrelevant to the Elite Missile.

It has two tactical rails: one on top and one on the right side of the blaster. There are also two strap points: one on the handle and one near the muzzle. It is compatible with barrel extensions and detachable shoulder stocks.

Source: http://nerf.wikia.com/wiki/Demolisher_2-In-1