Hoppered HAMP
Blaster Design and Instructions by KaneTheMediocre
Forum Threads:
http://nerfhaven.com/forums/index.php?showtopic=26197
http://nerfhaven.com/forums/index.php?showtopic=20030&st=0&p=282481
http://www.nerfrevolution.com/forums/viewtopic.php?f=9&t=870