User Summary:

The Wii Zapper is designed to combine the Wii Remote and Nunchuk into a gun-like configuration with the Wii Remote aligned as the barrel and the Nunchuk as the grip with the Z button of the Nunchuk functioning as a trigger. The function of this accessory is beyond simply simulating a gun as it allows the player to more accurately aim and fire with the Wii Remote.

Many third parties have created similar products.