Say hello to your new little friend, the "WeeP 5 Advanced Zapper," a mash-up of a toy MP5 gun and Wiimote innards (you can see the painted IR sensor just below the muzzle). The WeeP 5 is the work of Instructables user THeOReos, who was left disappointed by the range of gun shells available for the Wii (WHAAAT?!). It's just the ticket if you want your Zapper-compatible games to feel extra authentic, and we'd rather enjoy using it to drop bad dudes in Ghost Squad (though it may not suit Link's Crossbow Training).
THeOReos is confident this works well, and has posted a full step-by-step of the building process here. We lack the patience or skillz to make our own, but don't let that put you off building one and sending it to us!