This is the WeeP5, a fully functional Wii controller gun that looks like an MP5. [TheOreos] found the original zapper attachments to be lacking in several areas. His solution was to build a controller, integrated into an existing gun design with all the buttons exactly where he wanted them.  He picked up a toy MP5 and sacrificed a Wiimote for the cause. He did a fantastic job, it looks great and, according to him, works well too.  He may want to consider putting an orange tip on it though, just to keep from spooking the police.